{ "model": { "rank": 6450, "code": "thing-q211086", "model_id": "vr.tr.hydrogen-chloride", "name": "hydrogen chloride", "purpose": "Enable an AI agent to recognise hydrogen chloride, assess its material and containment state, and determine which handling or use decisions require further evidence.", "family": "Thing Registry", "category": "Physical world and living systems", "status": "research-draft", "kind": "thing", "plane": "PHY", "domain": "PHY.MAT", "industry": "", "version": "", "url": "/models/thing/q211086/", "tier": 2, "score": 60, "payload": { "layer": "wikidata", "aliases": [ "(³⁶Cl)Hydrogen chloride", "(³⁵Cl)Hydrogen chloride", "(³⁸Cl)Hydrogen chloride", "(³⁹Cl)Hydrogen chloride" ], "aliasCount": 4, "merged": 4, "knownIn": 60, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": "vr.tr.hydrogen-chloride", "source": { "dataset": "wikidata", "item": "Q211086", "url": "https://www.wikidata.org/wiki/Q211086", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-07T14:38:30Z", "providers": [ "Codex", "Grok" ], "missingProviders": [], "pass": 2, "cost": { "grok": { "usd": 0.04319208, "turns": 2, "seconds": 175.1, "error": null }, "codex": { "seconds": 79.2, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a07c4b-c766-7da0-9dcd-c5fc6888cf96\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: hydrogen chloride\nRegistry id: vr.tr.hydrogen-chloride\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entr" } } }, "metaModel": { "id": "THING-Q211086", "registryId": "vr.tr.hydrogen-chloride", "name": "hydrogen chloride", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q211086/", "model": { "registry_id": "vr.tr.hydrogen-chloride", "name": "hydrogen chloride", "purpose": "Enable an AI agent to recognise hydrogen chloride, assess its material and containment state, and determine which handling or use decisions require further evidence.", "definition": "Hydrogen chloride is the heteronuclear diatomic hydrogen halide HCl: a colourless, nonflammable, pungent gas at ordinary temperature and pressure that is fully dissociated in water as hydrochloric acid and is handled industrially as anhydrous compressed gas, refrigerated liquid, or aqueous solution under the same CAS number.", "scope_statement": "This model owns hydrogen chloride as a chemical substance and as an identified constituent of a material, including its physical state, composition, interaction with moisture, containment requirements and transformations; it records aqueous preparations through relationships without assuming that hydrochloric acid solutions and molecular hydrogen chloride have identical properties.", "in_scope": [ "Identification of hydrogen chloride, HCl, and evidence supporting that identification", "Physical state and conditions of a hydrogen chloride inventory or stream", "Hydrogen chloride content, water content and decision-relevant impurities", "Effects of moisture and dissolution on material identity, behaviour and handling", "Compatibility, containment condition and evidence required for proposed operations" ], "out_of_scope": [ "Complete formulation and application models for hydrochloric acid solutions", "Elemental chlorine, chloride salts and other hydrogen halides as independent substances", "Engineering design and certification of cylinders, piping and process equipment", "Facility ventilation, emergency response and occupational health programmes", "Detailed models of production processes and downstream reaction products" ], "distinguishing_features": [ "Require evidence for HCl identity; a chloride result alone cannot distinguish hydrogen chloride from a chloride salt.", "Distinguish hydrogen chloride gas or liquefied material from an aqueous hydrochloric acid preparation by recording water content, solvent and phase.", "Distinguish HCl from elemental chlorine, Cl2, using identification evidence rather than the shared presence of chlorine in their names.", "Treat acidity as supporting context rather than unique identification, because other substances also produce acidic aqueous solutions.", "Distinguish a material containing HCl from a substantially pure HCl inventory by recording its carrier medium and composition basis." ], "characteristics": [ { "name": "Chemical identity", "kind": "category", "unit_or_values": "HCl; confirmed, provisional or unresolved identification", "why_it_matters": "Prevents confusion with chlorine, chloride salts and other acidic materials." }, { "name": "Material presentation", "kind": "category", "unit_or_values": "Gas, liquefied inventory, gas mixture, aqueous solution or other specified mixture", "why_it_matters": "Determines which phase, composition and neighbouring material models apply." }, { "name": "Temperature", "kind": "measurement", "unit_or_values": "K or °C, with measurement location and time", "why_it_matters": "Supports interpretation of physical state and operating conditions." }, { "name": "Pressure", "kind": "measurement", "unit_or_values": "Pa or bar, explicitly absolute or gauge", "why_it_matters": "Supports assessment of containment and phase conditions." }, { "name": "Hydrogen chloride content", "kind": "measurement", "unit_or_values": "Mass fraction, mole fraction or concentration with an explicit basis and reference conditions", "why_it_matters": "Separates purity from dilution and supports inventory and use decisions." }, { "name": "Water content", "kind": "measurement", "unit_or_values": "Mass or mole fraction, with method and detection limit", "why_it_matters": "Moisture can change material behaviour and the suitability of contacting equipment." }, { "name": "Impurity profile", "kind": "measurement", "unit_or_values": "Named constituents and concentrations, including reporting limits", "why_it_matters": "Determines whether a particular supply meets its intended use requirements." }, { "name": "Contained quantity", "kind": "measurement", "unit_or_values": "kg or mol; distinguish total material quantity from HCl quantity", "why_it_matters": "Supports inventory reconciliation and operation-specific consequence assessment." }, { "name": "Contacting materials", "kind": "relation", "unit_or_values": "Linked vessel, valve, seal and piping materials with condition-specific compatibility evidence", "why_it_matters": "Compatibility must account for composition, moisture, temperature and pressure." }, { "name": "Containment condition", "kind": "state", "unit_or_values": "Verified intact, suspected loss, confirmed loss or unknown, with evidence timestamp", "why_it_matters": "Determines whether routine operations remain eligible for consideration." } ], "affordances": [ "Classify an identified inventory as hydrogen chloride, an HCl-containing mixture or a related aqueous preparation.", "Compare composition and impurity evidence against the requirements of a proposed use.", "Evaluate whether documented containment and contacting materials cover the actual moisture and operating conditions.", "Assess a proposed storage, transfer or dosing operation against linked approved procedures and verified prerequisites.", "Track HCl through dissolution, reaction or treatment while linking resulting materials to their own models." ] }, "sources": [ { "id": "wikipedia-hcl", "title": "Hydrogen chloride - Wikipedia, Wikimedia Foundation", "url": "https://en.wikipedia.org/wiki/Hydrogen_chloride", "what_it_supports": "IUPAC and systematic names, identifiers, melting and boiling points, density, water solubility, pKa, GHS statements, and the gas-versus-aqueous distinction.", "url_status": "live" }, { "id": "nist-webbook", "title": "Hydrogen chloride - NIST Chemistry WebBook, National Institute of Standards and Technology", "url": "https://webbook.nist.gov/cgi/cbook.cgi?Source=1941DAT%2FBAN305&Units=SI&Mask=2601", "what_it_supports": "CAS 7647-01-0, InChI/InChIKey, molecular weight 36.461, CODATA ΔfH°(g) and S°(g), synonym list including UN numbers, and the DCl isotopologue.", "url_status": "live" }, { "id": "pubchem-313", "title": "Hydrochloric Acid / Hydrogen Chloride, CID 313 - PubChem, NCBI/NLM", "url": "https://pubchem.ncbi.nlm.nih.gov/compound/313", "what_it_supports": "PubChem CID, EC number, UNII, dual UN numbers 1050/1789, industrial co-product routes, and the registry practice of filing gas and aqueous acid under one CID.", "url_status": "live" }, { "id": "cameo-noaa", "title": "Hydrogen chloride, anhydrous - CAMEO Chemicals, NOAA", "url": "https://cameochemicals.noaa.gov/report?key=CH8731", "what_it_supports": "UN/NA 1050, DOT poison-gas/corrosive labels, physical properties, acute concentration bands, and U.S. EPA/OSHA/CISA list thresholds.", "url_status": "live" }, { "id": "icsc-0163", "title": "ICSC 0163 Hydrogen chloride - ILO/WHO International Chemical Safety Cards (INCHEM)", "url": "https://www.inchem.org/documents/icsc/icsc/eics0163.htm", "what_it_supports": "GHS criteria for the anhydrous gas, UN class 2.3 with subsidiary 8, UN 2186 and 1789 cross-references, and metal/base/oxidant incompatibilities.", "url_status": "live" }, { "id": "niosh-npg", "title": "NIOSH Pocket Guide to Chemical Hazards: Hydrogen chloride - CDC/NIOSH", "url": "https://www.cdc.gov/niosh/npg/npgd0332.html", "what_it_supports": "REL and OSHA PEL ceiling 5 ppm, IDLH 50 ppm, 1 ppm = 1.49 mg/m³ conversion, relative gas density, and target organs.", "url_status": "live" }, { "id": "health-canada-hpr", "title": "Hazardous substance assessment: Hydrochloric acid and hydrogen chloride - Health Canada", "url": "https://www.canada.ca/en/health-canada/services/environmental-workplace-health/occupational-health-safety/workplace-hazardous-materials-information-system/hazardous-substance-assessments/hydrochloric-acid-hydrogen-chloride.html", "what_it_supports": "WHMIS split of HCl(g) versus HCl(aq), UN 1050/2186/1789, and concentration cut-offs for skin, eye and metal-corrosion categories.", "url_status": "live" }, { "id": "wikipedia-hcl-aq", "title": "Hydrochloric acid - Wikipedia, Wikimedia Foundation", "url": "https://en.wikipedia.org/wiki/Hydrochloric_acid", "what_it_supports": "Definition of hydrochloric acid as aqueous HCl, muriatic acid/spirits of salt names, commercial 37% density, and azeotrope boiling behaviour.", "url_status": "live" } ], "structure": { "bundles": [ { "id": "hcl-identity-and-boundaries", "name": "HCl identity and boundaries", "description": "Establishes what material is being called hydrogen chloride and which related identities must remain distinct.", "rationale": "HCl identity, chloride detection and aqueous acidity are different claims and cannot substitute for one another.", "layers": [ { "id": "chemical-identification", "name": "Chemical identification", "description": "Records evidence that identifies HCl rather than a neighbouring chlorine-containing or acidic substance.", "findings": [ { "id": "evidence-for-hcl", "name": "Evidence for HCl", "description": "Capture the identification claim, its evidence and the limits of the method used.", "questions": [ { "text": "What evidence identifies this material or constituent as HCl?", "kind": "provenance", "id": "evidence-for-hcl-q01" }, { "text": "Does the evidence distinguish HCl from chloride salts, elemental chlorine and other acids present in the sample?", "kind": "boundary", "id": "evidence-for-hcl-q02" } ] } ] }, { "id": "substance-and-preparation", "name": "Substance and preparation", "description": "Separates HCl substance identity from the identity of the material carrying it.", "findings": [ { "id": "carrier-and-solvent-boundary", "name": "Carrier and solvent boundary", "description": "Record whether the subject is an HCl inventory or an HCl constituent in a separately characterised preparation.", "questions": [ { "text": "Is the subject hydrogen chloride itself, a gas mixture containing HCl or a solution containing its dissolved forms?", "kind": "definition", "id": "carrier-and-solvent-boundary-q01" }, { "text": "Which properties and decisions require a linked mixture or hydrochloric acid solution model?", "kind": "boundary", "id": "carrier-and-solvent-boundary-q02" } ] } ] } ] }, { "id": "phase-and-inventory", "name": "Phase and inventory", "description": "Describes the physical presentation and amount of hydrogen chloride under recorded conditions.", "rationale": "An HCl gas stream and an inventory containing liquid and vapour require different interpretations of pressure, sampling and quantity.", "layers": [ { "id": "physical-state", "name": "Physical state", "description": "Connects observed or inferred phase to temperature, pressure and composition.", "findings": [ { "id": "phase-at-recorded-conditions", "name": "Phase at recorded conditions", "description": "Record phase evidence and distinguish measured state from a prediction.", "questions": [ { "text": "What phases are present at the recorded temperature, pressure and composition?", "kind": "measurement", "id": "phase-at-recorded-conditions-q01" }, { "text": "What observation or validated property source supports the assigned phase?", "kind": "provenance", "id": "phase-at-recorded-conditions-q02" } ] } ] }, { "id": "amount-and-distribution", "name": "Amount and distribution", "description": "Distinguishes total material inventory from the amount and location of HCl within it.", "findings": [ { "id": "hcl-quantity-basis", "name": "HCl quantity basis", "description": "Capture the quantity basis and any assumptions about distribution between phases or locations.", "questions": [ { "text": "How much HCl is present, and how was that amount distinguished from the total mixture quantity?", "kind": "measurement", "id": "hcl-quantity-basis-q01" }, { "text": "Does the estimate account for HCl in each relevant phase and connected containment volume?", "kind": "boundary", "id": "hcl-quantity-basis-q02" } ] } ] } ] }, { "id": "composition-and-moisture", "name": "Composition and moisture", "description": "Captures HCl concentration, impurities and water exposure relevant to material suitability.", "rationale": "An anhydrous label or nominal purity does not establish the actual water content or all use-relevant impurities.", "layers": [ { "id": "purity-and-dilution", "name": "Purity and dilution", "description": "Interprets composition claims using explicit analytical and reporting bases.", "findings": [ { "id": "composition-evidence", "name": "Composition evidence", "description": "Record measured HCl content and impurities without treating an unspecified remainder as known.", "questions": [ { "text": "What is the HCl content, on what basis, and with what measurement uncertainty or specification tolerance?", "kind": "measurement", "id": "composition-evidence-q01" }, { "text": "Which impurities were measured, and which were unmeasured or below reporting limits?", "kind": "provenance", "id": "composition-evidence-q02" } ] } ] }, { "id": "water-and-dissolution", "name": "Water and dissolution", "description": "Tracks water content and contact with aqueous media as conditions affecting HCl behaviour.", "findings": [ { "id": "moisture-status", "name": "Moisture status", "description": "Distinguish a documented moisture specification from measured water content and subsequent exposure.", "questions": [ { "text": "What measured water content or documented criterion supports describing this material as anhydrous or dry?", "kind": "measurement", "id": "moisture-status-q01" }, { "text": "Has water ingress or aqueous contact changed the material enough to require reassessment or a linked solution record?", "kind": "boundary", "id": "moisture-status-q02" } ] } ] } ] }, { "id": "containment-and-compatible-contact", "name": "Containment and compatible contact", "description": "Relates the actual HCl material state to its containment and all contacting materials.", "rationale": "Suitability cannot be inferred from a generic acid-resistance claim without checking HCl composition and operating conditions.", "layers": [ { "id": "contact-material-suitability", "name": "Contact material suitability", "description": "Records compatibility evidence for surfaces, seals and components exposed to the material.", "findings": [ { "id": "condition-specific-compatibility", "name": "Condition-specific compatibility", "description": "Require compatibility evidence that covers the proposed HCl service conditions.", "questions": [ { "text": "Which materials contact the HCl, including seals, valves and any sampling components?", "kind": "definition", "id": "condition-specific-compatibility-q01" }, { "text": "What evidence supports their suitability at the actual water content, concentration, temperature and pressure?", "kind": "provenance", "id": "condition-specific-compatibility-q02" } ] } ] }, { "id": "containment-and-release-evidence", "name": "Containment and release evidence", "description": "Connects inventory condition to inspection and HCl-specific detection evidence.", "findings": [ { "id": "integrity-and-detection-confidence", "name": "Integrity and detection confidence", "description": "Record suspected or verified containment loss together with the scope and limitations of detection.", "questions": [ { "text": "What current inspection or monitoring evidence supports the containment condition?", "kind": "provenance", "id": "integrity-and-detection-confidence-q01" }, { "text": "What HCl concentrations were detected, where and when, and what detection limits or interferences apply?", "kind": "measurement", "id": "integrity-and-detection-confidence-q02" } ] } ] } ] }, { "id": "use-and-transformation-decisions", "name": "Use and transformation decisions", "description": "Connects the assessed HCl state to proposed operations and resulting material identities.", "rationale": "An agent must distinguish eligibility for an operation from evidence that HCl has actually been transferred, dissolved or consumed.", "layers": [ { "id": "operation-prerequisites", "name": "Operation prerequisites", "description": "Evaluates proposed HCl operations against documented requirements and current evidence.", "findings": [ { "id": "operation-eligibility", "name": "Operation eligibility", "description": "Record the proposed operation, governing procedure and any unmet conditions.", "questions": [ { "text": "For the proposed storage, transfer, dosing or dissolution operation, which approved procedure covers this HCl presentation?", "kind": "action", "id": "operation-eligibility-q01" }, { "text": "Are the required composition, moisture, containment and equipment conditions verified, or what evidence prevents proceeding?", "kind": "action", "id": "operation-eligibility-q02" } ] } ] }, { "id": "transformation-and-residual-hcl", "name": "Transformation and residual HCl", "description": "Tracks HCl across dissolution, reaction and treatment without assuming disappearance from a process label.", "findings": [ { "id": "fate-and-completion-evidence", "name": "Fate and completion evidence", "description": "Record where HCl goes, what resulting materials are identified and how residual HCl is assessed.", "questions": [ { "text": "Was HCl transferred, dissolved or chemically consumed, and which resulting material records describe its fate?", "kind": "boundary", "id": "fate-and-completion-evidence-q01" }, { "text": "What measurements and acceptance criteria establish residual HCl and completion of the intended transformation?", "kind": "measurement", "id": "fate-and-completion-evidence-q02" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-kinds", "name": "Kinds and varieties", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Anhydrous compressed hydrogen chloride gas (UN 1050)", "Refrigerated liquefied hydrogen chloride (UN 2186)", "Aqueous hydrochloric acid, HCl(aq) (UN 1789)", "Commercial concentrated hydrochloric acid (about 36-38 wt% HCl)", "Constant-boiling aqueous azeotrope (about 20.2 wt% HCl)", "Hydrogen chloride aerosol or mist (a form singled out in U.S. TRI reporting)", "Deuterium chloride (DCl; NIST isotopologue hydrochloric acid-d)" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of hydrogen chloride this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "scheme": "CAS Registry Number", "value_or_pattern": "7647-01-0", "note": "Used for both anhydrous HCl and aqueous hydrochloric acid in most chemical inventories." }, { "scheme": "PubChem CID", "value_or_pattern": "313", "note": "PubChem files hydrogen chloride and hydrochloric acid as one compound." }, { "scheme": "EC number (EINECS)", "value_or_pattern": "231-595-7", "note": "ECHA/REACH substance identifier." }, { "scheme": "ECHA InfoCard", "value_or_pattern": "100.028.723", "note": "European Chemicals Agency card for HCl." }, { "scheme": "UN number", "value_or_pattern": "1050", "note": "Anhydrous hydrogen chloride, compressed; Class 2.3, subsidiary 8." }, { "scheme": "UN number", "value_or_pattern": "2186", "note": "Hydrogen chloride, refrigerated liquid; Class 2.3, subsidiary 8." }, { "scheme": "UN number", "value_or_pattern": "1789", "note": "Hydrochloric acid (aqueous); Class 8, packing group II or III." }, { "scheme": "IUPAC InChI", "value_or_pattern": "InChI=1S/ClH/h1H", "note": "NIST standard InChI; Wikipedia also lists InChI=1S/HCl/h1H." }, { "scheme": "InChIKey", "value_or_pattern": "VEXZGXHMUGYJMC-UHFFFAOYSA-N", "note": "Standard hashed InChI." }, { "scheme": "ChEBI", "value_or_pattern": "CHEBI:17883", "note": "ChEBI entity for hydrogen chloride." }, { "scheme": "FDA UNII", "value_or_pattern": "QTT17582CB", "note": "Global Substance Registration System." }, { "scheme": "EPA CompTox DTXSID", "value_or_pattern": "DTXSID2020711", "note": "U.S. EPA DSSTox identifier." }, { "scheme": "ChemSpider", "value_or_pattern": "307", "note": "Royal Society of Chemistry ChemSpider ID." }, { "scheme": "RTECS", "value_or_pattern": "MW4025000", "note": "NIOSH RTECS number." }, { "scheme": "EU Index number", "value_or_pattern": "017-002-00-2", "note": "CLP/GHS annex index for hydrogen chloride." }, { "scheme": "SMILES", "value_or_pattern": "Cl", "note": "Canonical SMILES used by PubChem/NIST for HCl." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of hydrogen chloride this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-standards-and-regulation", "name": "Standards and regulation", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "OSHA PEL ceiling 5 ppm (7 mg/m³), 29 CFR 1910.1000 Table Z-1 (Occupational Safety and Health Administration)", "OSHA Process Safety Management highly hazardous chemical, threshold quantity 5,000 lb for hydrogen chloride / anhydrous hydrochloric acid, 29 CFR 1910.119 (OSHA)", "NIOSH REL ceiling 5 ppm (7 mg/m³); Pocket Guide IDLH 50 ppm; 2025 IDLH Value Profile 45 ppm (CDC/NIOSH)", "ACGIH TLV ceiling 2 ppm (American Conference of Governmental Industrial Hygienists, as cited in industrial stewardship summaries)", "ILO/WHO International Chemical Safety Card ICSC 0163 (ILO and WHO)", "UN GHS: compressed gas, toxic if inhaled, causes severe skin burns and eye damage (H314, H331; UNECE GHS / ICSC)", "UN Recommendations on the Transport of Dangerous Goods: UN 1050 and UN 2186 Class 2.3 + 8; UN 1789 Class 8 (UNECE)", "EU CLP/REACH: EC 231-595-7, Index 017-002-00-2 (European Chemicals Agency)", "U.S. Clean Air Act §112 hazardous air pollutant; CAA §112(r) RMP threshold 5,000 lb for anhydrous HCl (U.S. EPA)", "EPCRA §302 extremely hazardous substance, TPQ 500 lb for hydrogen chloride anhydrous/gas only (U.S. EPA)", "CERCLA/EPCRA reportable-quantity and TRI listing, including aerosol-only hydrochloric acid (U.S. EPA)", "CISA Chemical Facility Anti-Terrorism Standards: hydrogen chloride (anhydrous) and hydrochloric acid ≥37% as chemicals of interest (CISA)", "Canada Hazardous Products Regulations / WHMIS classification distinguishing HCl(g) from HCl(aq) (Health Canada)" ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of hydrogen chloride this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Shipped as a liquefied compressed gas in cylinders (anhydrous) or as aqueous acid in tanks and carboys.", "Industrial co-product of vinyl chloride, isocyanates, fluorocarbons, and chlorinated methanes/ethanes, and of inorganic routes to magnesium, fumed silica and titanium dioxide.", "Feedstock for organic chlorides (methyl chloride, ethyl chloride, chlorobenzenes) and for PVC-chain chemistry.", "Metal pickling, cleaning, electroplating, ore refining, and petroleum-well acidizing, usually as aqueous hydrochloric acid.", "Leather tanning and refining of fats, soaps and edible oils.", "Formed in volcanic gases and as a combustion product when PVC and other chlorinated plastics burn.", "Encountered in the body as gastric hydrochloric acid; commercial concentrated acid is typically 36-38% HCl in water." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of hydrogen chloride this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "quantity": "Molar mass", "typical_range": "36.46 (NIST 36.461)", "unit": "g/mol" }, { "quantity": "Melting point (anhydrous)", "typical_range": "−114.22", "unit": "°C" }, { "quantity": "Boiling point (anhydrous, 101.3 kPa)", "typical_range": "−85.05", "unit": "°C" }, { "quantity": "Gas density", "typical_range": "about 1.49", "unit": "g/L" }, { "quantity": "Relative vapour density (air = 1)", "typical_range": "1.27-1.27", "unit": "dimensionless" }, { "quantity": "Water solubility", "typical_range": "561 (60 °C) to 823 (0 °C); about 720 at 20 °C", "unit": "g/L" }, { "quantity": "Vapour pressure (near 20 °C)", "typical_range": "about 4.26-4.35", "unit": "MPa" }, { "quantity": "Aqueous pKa", "typical_range": "about −3.0 to −5.9", "unit": "dimensionless" }, { "quantity": "Standard enthalpy of formation, gas (CODATA)", "typical_range": "−92.31 ± 0.10", "unit": "kJ/mol" }, { "quantity": "Standard entropy, gas, 1 bar (CODATA)", "typical_range": "186.902 ± 0.005", "unit": "J/(mol·K)" }, { "quantity": "Workplace ceiling (OSHA PEL / NIOSH REL)", "typical_range": "5", "unit": "ppm" }, { "quantity": "IDLH", "typical_range": "45 (NIOSH 2025 profile) to 50 (Pocket Guide)", "unit": "ppm" }, { "quantity": "Air concentration conversion", "typical_range": "1 ppm = 1.49", "unit": "mg/m³" }, { "quantity": "Odor threshold (ATSDR)", "typical_range": "about 0.77 (only ~50% of distracted persons detect it at 5 ppm)", "unit": "ppm" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of hydrogen chloride this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Inhalation of the gas or acid mist burns the nose, throat and lungs; laryngeal spasm and pulmonary edema are documented animal/human outcomes. Concentrations of 1,000-2,000 ppm are dangerous even briefly; IDLH is 45-50 ppm.", "Contact with moisture yields hydrochloric acid that causes severe skin and eye burns; liquefied HCl also causes frostbite.", "The vapour is heavier than air and can pool in pits, cellars and poorly ventilated low spots.", "Attacks many metals when wet, evolving flammable hydrogen; reacts violently with bases and with oxidants (the latter can release chlorine).", "Compressed or refrigerated containers are GHS compressed-gas hazards and can rupture if heated; a liquid leak should be oriented so gas, not liquid, escapes.", "White fumes in moist air create a corrosive acid mist; mists are still harmful but are often described as less dehydrating than the anhydrous gas." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of hydrogen chloride this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-regional-variation", "name": "Regional variation", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "English, Japanese and German (among others) treat the anhydrous gas and the aqueous acid as different named substances: hydrogen chloride / hydrochloric acid; 塩化水素 / 塩酸; Chlorwasserstoff / Salzsäure.", "Trade names muriatic acid and spirits of salt still mean impure aqueous HCl in construction, masonry and pool chemicals, especially in North America and Britain.", "Inventories often share CAS 7647-01-0 across gas and solution, while transport law splits them as UN 1050, UN 2186 and UN 1789.", "Occupational ceilings differ: OSHA and NIOSH 5 ppm versus ACGIH TLV 2 ppm.", "Canada's WHMIS assessment states separate classification cut-offs for hydrogen chloride versus hydrochloric acid concentration bands." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of hydrogen chloride this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "name": "Hydrochloric acid (aqueous HCl)", "difference": "The acid is HCl dissolved in water, not the anhydrous molecule; transport UN 1789 (Class 8) versus UN 1050/2186 (Class 2.3+8), and the commercial liquid boils near 50-110 °C depending on titre rather than at −85 °C." }, { "name": "Hydrogen fluoride (HF)", "difference": "Different formula and CAS; HF boils near 19.5 °C because of hydrogen bonding, etches glass/silica, and is a weak acid in water (pKa ≈ 3.2) whereas HCl is a strong acid (pKa about −3 to −6)." }, { "name": "Hydrogen bromide (HBr)", "difference": "Different hydrogen halide (Br not Cl); identify by formula/CAS and by boiling point (HBr is substantially higher than HCl's −85 °C)." }, { "name": "Chlorine (Cl2)", "difference": "Elemental chlorine is a greenish-yellow oxidising gas, not a hydrogen halide; it does not form white acid fumes with moist air in the same way and is classified as an oxidiser rather than an anhydrous acid gas." }, { "name": "Amine hydrochlorides and other solid hydrochlorides", "difference": "Those are ionic salts of HCl, typically solids; they do not ship as UN 1050 gas and do not fume as anhydrous HCl until they release HCl." }, { "name": "Hydrogen sulfide (H2S)", "difference": "Both are pungent toxic gases that can accumulate low, but H2S is flammable with a rotten-egg odour, whereas HCl is nonflammable with a sharp acidic odour and forms hydrochloric acid with moisture." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of hydrogen chloride this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Does an existing Vercy world model already own hydrogen chloride or hydrochloric acid, and how should this registry entry link to that source of truth?", "Where should registry ownership fall between hydrogen chloride substance identity and aqueous hydrochloric acid preparations?", "Which authoritative property sources and validated methods should govern phase assessment and HCl identification in relevant mixtures?", "Which use-specific water and impurity criteria, supported by compatibility evidence, are needed for the intended HCl applications?", "Which operating jurisdictions and facility procedures supply the applicable exposure criteria, containment requirements and action thresholds?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 18, "questions": 28 } }, "draft": { "generator": "vr.draft.v3", "status": "draft-generated", "researched": false, "archetype": "chemical substance or material", "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a hydrogen chloride, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an AI agent to recognise hydrogen chloride, assess its material and containment state, and determine which handling or use decisions require further evidence.", "characteristics": { "substance": "material", "origin": "natural", "agency": "inert", "mobility": "varies" }, "whatYouCanDoWithIt": [ "observed and measured", "consumed or used up" ], "distinguishingFeatures": [ "Names folded into this entry, which a task may need to split apart again: (³⁶Cl)Hydrogen chloride, (³⁵Cl)Hydrogen chloride, (³⁸Cl)Hydrogen chloride, (³⁹Cl)Hydrogen chloride.", "4 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 60 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a hydrogen chloride, and on what evidence are they told apart?" ], "whatItIsMadeOf": "matter you can touch", "physicalCharacter": [ "Mobility varies between examples.", "Does nothing on its own; everything it does, something else did to it.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state", "use it up, and then need more of it" ], "howItIsRecognised": [ "Not recognisable by sight in any reliable way. Appearance varies with grade, form and additives; identification is by label, by documentation, or by assay." ], "relatedModels": [ { "relation": "covers", "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.", "targets": [ "(³⁶Cl)Hydrogen chloride", "(³⁵Cl)Hydrogen chloride", "(³⁸Cl)Hydrogen chloride", "(³⁹Cl)Hydrogen chloride" ] } ], "standing": "Described in 60 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 4 finer distinctions are held inside this entry as names rather than as separate models.", "structure": { "bundles": [ { "id": "identity-and-classification", "name": "Identity, naming and classification", "description": "How an agent tells one hydrogen chloride from another, and a hydrogen chloride from things that resemble it.", "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.", "layers": [ { "id": "naming-and-identifiers", "name": "Names and identifiers", "description": "The names this thing goes by and the identifiers that survive translation and time.", "findings": [ { "id": "preferred-name-and-aliases", "name": "Preferred name, aliases and local names", "description": "Which name to use, which names mean the same thing, and which merely sound similar.", "questions": [ { "id": "preferred-name-and-aliases-q01", "text": "What identifies and describes the name of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "preferred-name-and-aliases-q02", "text": "Who or what asserted this about the name of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "preferred-name-and-aliases-q03", "text": "What may an agent decide or do once the name of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "stable-identifiers", "name": "Stable identifiers and external keys", "description": "Identifiers that keep pointing at this kind of thing across systems and languages.", "questions": [ { "id": "stable-identifiers-q01", "text": "What identifies and describes an identifier for a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stable-identifiers-q02", "text": "Who or what asserted this about an identifier for a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stable-identifiers-q03", "text": "What may an agent decide or do once an identifier for a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "classification-and-granularity", "name": "Classification and granularity", "description": "Where a hydrogen chloride sits among kinds, and how finely a task needs to cut it.", "findings": [ { "id": "kind-and-parents", "name": "Kind, parents and neighbouring kinds", "description": "The classes this thing belongs to and the ones it is next to.", "questions": [ { "id": "kind-and-parents-q01", "text": "What identifies and describes the kind of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "kind-and-parents-q02", "text": "Who or what asserted this about the kind of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "kind-and-parents-q03", "text": "What may an agent decide or do once the kind of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] }, { "id": "distinguishing-features", "name": "Distinguishing features", "description": "What separates a hydrogen chloride from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "distinguishing-features-q02", "text": "Who or what asserted this about what distinguishes a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "distinguishing-features-q03", "text": "What may an agent decide or do once what distinguishes a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "form-and-composition", "name": "Form, composition and condition", "description": "What a hydrogen chloride is made of, what shape and size it takes, and what state it is in.", "rationale": "A physical thing can be measured, and a model that cannot record its measurements cannot support any decision that depends on them.", "layers": [ { "id": "form-and-dimensions", "name": "Form and dimensions", "description": "Shape, size, mass and the ranges these take across examples.", "findings": [ { "id": "measurable-dimensions", "name": "Measurable dimensions and their units", "description": "The quantities worth recording and the units they are recorded in.", "questions": [ { "id": "measurable-dimensions-q01", "text": "What identifies and describes the dimensions of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "measurable-dimensions-q02", "text": "Who or what asserted this about the dimensions of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "measurable-dimensions-q03", "text": "What may an agent decide or do once the dimensions of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "material-and-composition", "name": "Material and composition", "description": "Materials, parts and how they are put together.", "findings": [ { "id": "parts-and-materials", "name": "Parts and materials", "description": "What a hydrogen chloride is built from and which parts are replaceable.", "questions": [ { "id": "parts-and-materials-q01", "text": "What identifies and describes the composition of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "parts-and-materials-q02", "text": "Who or what asserted this about the composition of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "parts-and-materials-q03", "text": "What may an agent decide or do once the composition of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "condition-and-integrity", "name": "Condition and integrity", "description": "Wear, damage, health and the difference between working and broken.", "findings": [ { "id": "condition-assessment", "name": "Condition, damage and health", "description": "How the condition of a hydrogen chloride is judged and by whom.", "questions": [ { "id": "condition-assessment-q01", "text": "What identifies and describes the condition of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "condition-assessment-q02", "text": "Who or what asserted this about the condition of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "condition-assessment-q03", "text": "What may an agent decide or do once the condition of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "place-and-movement", "name": "Place and movement", "description": "Where a hydrogen chloride is, how it got there and where it may go (varies).", "rationale": "A thing that can move needs its position recorded with a time, or every later claim about it is about a place it has left.", "layers": [ { "id": "location-and-placement", "name": "Location and placement", "description": "Position, containment and the reference frame the position is given in.", "findings": [ { "id": "position-and-frame", "name": "Position, container and reference frame", "description": "Where a hydrogen chloride is, and what that position is measured against.", "questions": [ { "id": "position-and-frame-q01", "text": "What identifies and describes the location of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "position-and-frame-q02", "text": "Who or what asserted this about the location of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "position-and-frame-q03", "text": "What may an agent decide or do once the location of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "movement-and-transfer", "name": "Movement and transfer", "description": "How a hydrogen chloride is carried, installed or relocated.", "findings": [ { "id": "movement-events", "name": "Movement events and constraints", "description": "What counts as a movement, what records it and what limits it.", "questions": [ { "id": "movement-events-q01", "text": "What identifies and describes the movement of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "movement-events-q02", "text": "Who or what asserted this about the movement of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "movement-events-q03", "text": "What may an agent decide or do once the movement of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "state-and-lifecycle", "name": "State and lifecycle", "description": "The states a hydrogen chloride passes through and the events that move it between them.", "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.", "layers": [ { "id": "lifecycle-stages", "name": "Lifecycle stages", "description": "From coming into existence to ceasing to be one of these.", "findings": [ { "id": "stages-and-transitions", "name": "Stages and transitions", "description": "The stages worth naming and what moves a hydrogen chloride between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "stages-and-transitions-q02", "text": "Who or what asserted this about the lifecycle of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "stages-and-transitions-q03", "text": "What may an agent decide or do once the lifecycle of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "observations-and-status", "name": "Observations and current status", "description": "What is observed about a hydrogen chloride, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a hydrogen chloride is recorded so that it can be superseded rather than overwritten.", "questions": [ { "id": "observation-record-q01", "text": "What identifies and describes an observation of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "observation-record-q02", "text": "Who or what asserted this about an observation of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "observation-record-q03", "text": "What may an agent decide or do once an observation of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "use-and-operation", "name": "Use and operation", "description": "What can be done with a hydrogen chloride and what it takes to do it.", "rationale": "An agent that can recognise a thing but not act on it has only half a model.", "layers": [ { "id": "intended-use", "name": "Intended use and function", "description": "What a hydrogen chloride is for, and what it is used for anyway.", "findings": [ { "id": "function-and-purpose", "name": "Function, purpose and misuse", "description": "The function a hydrogen chloride performs and the uses that fall outside it.", "questions": [ { "id": "function-and-purpose-q01", "text": "What identifies and describes the use of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "function-and-purpose-q02", "text": "Who or what asserted this about the use of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "function-and-purpose-q03", "text": "What may an agent decide or do once the use of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "handling-and-procedure", "name": "Handling and procedure", "description": "The steps, skills and tools involved in using a hydrogen chloride.", "findings": [ { "id": "procedures-and-skills", "name": "Procedures, skills and required tools", "description": "What an agent needs before it can act on a hydrogen chloride at all.", "questions": [ { "id": "procedures-and-skills-q01", "text": "What identifies and describes handling a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "procedures-and-skills-q02", "text": "Who or what asserted this about handling a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "procedures-and-skills-q03", "text": "What may an agent decide or do once handling a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "supply-and-consumption", "name": "Supply and consumption", "description": "Quantities, rates and what running out means.", "findings": [ { "id": "consumption-and-stock", "name": "Consumption, stock and replenishment", "description": "How much of a hydrogen chloride there is and how fast it goes.", "questions": [ { "id": "consumption-and-stock-q01", "text": "What identifies and describes the supply of a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "consumption-and-stock-q02", "text": "Who or what asserted this about the supply of a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "consumption-and-stock-q03", "text": "What may an agent decide or do once the supply of a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] }, { "id": "composition-and-identity", "name": "Composition, grade and chemical identity", "description": "What hydrogen chloride is made of and how pure the thing in hand is.", "rationale": "Grade decides what a substance may be used for, so a model that records only the name cannot support any decision about use.", "layers": [ { "id": "chemical-identity", "name": "Chemical identity", "description": "Formula, structure and the registry numbers that name it unambiguously.", "findings": [ { "id": "identity-record", "name": "Identity and registry numbers", "description": "What identifies this substance across suppliers and regulators.", "questions": [ { "id": "identity-record-q01", "text": "What formula, structure and registry identifiers name hydrogen chloride unambiguously?", "kind": "definition" }, { "id": "identity-record-q02", "text": "Which related substances share a name in common use but not an identifier?", "kind": "boundary" } ] } ] }, { "id": "grade-and-impurities", "name": "Grade, purity and impurities", "description": "The specification a batch meets and what else is in it.", "findings": [ { "id": "specification", "name": "Specification and assay", "description": "How purity is stated and measured, and which impurities matter.", "questions": [ { "id": "specification-q01", "text": "What grades of hydrogen chloride exist, how is purity assayed, and which impurities are limited?", "kind": "measurement" }, { "id": "specification-q02", "text": "Which use requires which grade, and what happens when a lower grade is substituted?", "kind": "action" } ] } ] } ] }, { "id": "properties-and-behaviour", "name": "Properties and behaviour", "description": "How hydrogen chloride behaves under conditions an agent can measure or change.", "rationale": "Physical constants are the part of a substance model that transfers between contexts, and each needs its unit and its conditions.", "layers": [ { "id": "physical-constants", "name": "Physical constants", "description": "Values that hold for the pure substance, with their conditions.", "findings": [ { "id": "constants-record", "name": "Constants and conditions", "description": "The quantities worth recording and the state they apply in.", "questions": [ { "id": "constants-record-q01", "text": "What are the defining physical constants of hydrogen chloride, in what units and under what conditions?", "kind": "measurement" }, { "id": "constants-record-q02", "text": "Which of these values change with grade or form rather than being fixed?", "kind": "boundary" } ] } ] }, { "id": "stability-and-reactivity", "name": "Stability and reactivity", "description": "What it reacts with, degrades into, and how it is stored.", "findings": [ { "id": "incompatibilities", "name": "Incompatibilities and degradation", "description": "What must not meet it, and what it becomes over time.", "questions": [ { "id": "incompatibilities-q01", "text": "What is hydrogen chloride incompatible with, and what does it degrade into under storage?", "kind": "definition" }, { "id": "incompatibilities-q02", "text": "What storage and handling does that require, and who is competent to do it?", "kind": "action" } ] } ] } ] }, { "id": "hazard-and-regulation", "name": "Hazard classification and regulation", "description": "How hydrogen chloride can harm, and what the law says about holding and moving it.", "rationale": "A substance model without its hazard class and its regulatory identity is unusable in exactly the situations that matter.", "layers": [ { "id": "hazard-class", "name": "Hazard classification", "description": "Classified hazards, exposure limits and protective measures.", "findings": [ { "id": "classified-hazards", "name": "Classified hazards and limits", "description": "The classification, the scheme it belongs to, and the limits set.", "questions": [ { "id": "classified-hazards-q01", "text": "How is hydrogen chloride classified for hazard, under which scheme, and what exposure limits apply?", "kind": "definition" }, { "id": "classified-hazards-q02", "text": "What protection does handling require, and what must an agent refuse to do without it?", "kind": "action" } ] } ] }, { "id": "regulatory-identity", "name": "Regulatory identity and control", "description": "Registration, restriction and transport rules by jurisdiction.", "findings": [ { "id": "controls", "name": "Controls and jurisdiction", "description": "Where it is restricted and what the restriction attaches to.", "questions": [ { "id": "controls-q01", "text": "Which registrations, restrictions or transport rules cover hydrogen chloride, and where?", "kind": "provenance" }, { "id": "controls-q02", "text": "Does the control attach to the substance, its concentration, or its intended use?", "kind": "boundary" } ] } ] } ] }, { "id": "provenance-and-evidence", "name": "Provenance, evidence and time", "description": "Where every claim about a hydrogen chloride came from and when it held.", "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.", "layers": [ { "id": "source-and-authority", "name": "Source and authority", "description": "Who said it, on what evidence, and how strongly.", "findings": [ { "id": "claim-provenance", "name": "Claim provenance and confidence", "description": "The authority behind each claim about a hydrogen chloride and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "claim-provenance-q02", "text": "Who or what asserted this about a claim about a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "claim-provenance-q03", "text": "What may an agent decide or do once a claim about a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] }, { "id": "time-and-versions", "name": "Time, versions and supersession", "description": "When a claim was true, when it was learnt, and what replaced it.", "findings": [ { "id": "validity-and-supersession", "name": "Validity period and supersession", "description": "How an old claim about a hydrogen chloride is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a hydrogen chloride, and in what units or vocabulary?", "kind": "definition", "answer_data": [ "identifiers", "types and classes", "values with units", "explicit unknowns" ] }, { "id": "validity-and-supersession-q02", "text": "Who or what asserted this about the validity of a claim about a hydrogen chloride, by which method, and when was it true?", "kind": "provenance", "answer_data": [ "authority", "method", "evidence", "event time", "knowledge time" ] }, { "id": "validity-and-supersession-q03", "text": "What may an agent decide or do once the validity of a claim about a hydrogen chloride is known, and what must it refuse?", "kind": "action", "answer_data": [ "permitted actions", "preconditions", "refusals", "escalation" ] } ] } ] } ] } ] }, "statistics": { "bundles": 9, "layers": 20, "findings": 22, "questions": 60 } } } }