{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T10:50:33Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 19.8, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\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: 01a0953c-82d9-77e2-a66a-a59a695f0182\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: L-threonic acid\nSense to describe: (none recorded)\nDomain code: PHY.MAT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 043: 1001", "usd": 0.0, "recall": true }, "codex": { "seconds": 68.4, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\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: 01a0953c-82ca-7a82-8417-22aff71eb61f\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: L-threonic acid\nRegistry id: vr.tr.l-threonic-acid\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entry: (" } }, "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T12:00:00Z", "ingestedAt": "2026-10-06T08:48:47+00:00", "fields": [ "agent_conduct", "ethics", "failure_modes_and_hazards", "owners", "visual_identification" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:30+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q3270244", "registryId": "vr.tr.l-threonic-acid", "name": "L-threonic acid", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q3270244/", "model": { "registry_id": "vr.tr.l-threonic-acid", "name": "L-threonic acid", "purpose": "Enable an agent to recognise L-threonic acid, assess the identity and condition of a sample, and determine its suitability for a specified chemical or analytical use.", "definition": "L-threonic acid is a four-carbon sugar acid with formula C4H8O5, corresponding to oxidation of the aldehyde group of L-threose to a carboxyl group, and is associated with ascorbic acid degradation.", "scope_statement": "This model owns vr.tr.l-threonic-acid in PHY / PHY.MAT: the stereochemically defined free acid, its sample composition, condition-dependent speciation, analytical verification and evidence needed for handling or use.", "in_scope": [ "Molecular identity and stereochemistry of L-threonic acid", "Free-acid content, stereochemical purity and sample impurities", "Physical form, solution concentration and acid-base speciation", "Analytical identification, quantification and stability assessment", "Substance-specific handling evidence and regulatory identifiers" ], "out_of_scope": [ "Magnesium, calcium and other L-threonate salts as independently specified substances", "D-threonic acid, erythronic acid and unresolved stereoisomer mixtures as separate substances", "L-threonine and L-threose", "Finished supplements, medicines and their efficacy claims", "Manufacturing processes and complete biological pathways" ], "distinguishing_features": [ "Require the (2R,3S)-2,3,4-trihydroxybutanoic acid structure; formula C4H8O5 alone does not establish stereochemical identity. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/L-threonic-acid)", "Distinguish the protonated acid from its L-threonate conjugate base and from counterion-containing salts. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/L-threonic-acid)", "Use stereochemistry-sensitive evidence to distinguish L-threonic acid from D-threonic acid and erythronic stereoisomers.", "Check functional groups and elemental composition to exclude similarly named L-threonine and L-threose.", "Confirm identifiers against structure: PubChem CID 5460407 and CAS 7306-96-9 identify this entry; a name containing only 'threonate' is insufficient. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/L-threonic-acid)" ], "characteristics": [ { "name": "Stereochemical identity", "kind": "category", "unit_or_values": "(2R,3S); alternate stereoisomer; unresolved", "why_it_matters": "Determines whether the material belongs to this registry entry." }, { "name": "Acid and salt relationship", "kind": "relation", "unit_or_values": "Free acid; dissolved conjugate base; identified counterion and stoichiometry", "why_it_matters": "Prevents salt properties and quantities from being assigned to the free acid." }, { "name": "L-threonic acid assay", "kind": "measurement", "unit_or_values": "Mass fraction %, with as-received or dry basis and method", "why_it_matters": "Supports dosing of reagent quantities and acceptance against a use specification." }, { "name": "Stereoisomer composition", "kind": "measurement", "unit_or_values": "Mole fraction % for resolved stereoisomers; method and detection limit", "why_it_matters": "Separates stereochemical purity from total chemical assay." }, { "name": "Water and residual solvent content", "kind": "measurement", "unit_or_values": "Mass fraction % or mg/g, separately by component", "why_it_matters": "Changes the amount of acid delivered by a weighed sample." }, { "name": "Physical presentation", "kind": "state", "unit_or_values": "Observed solid, liquid or solution; temperature, solvent and concentration", "why_it_matters": "Makes storage observations and property measurements interpretable." }, { "name": "Solution acidity and speciation", "kind": "measurement", "unit_or_values": "pH and estimated species fractions at stated temperature, concentration and ionic strength", "why_it_matters": "Distinguishes total analytical content from the amount present as protonated acid." }, { "name": "Conditioned physical constants", "kind": "measurement", "unit_or_values": "Solubility in g/L; thermal events in °C; pressure, medium and method required", "why_it_matters": "Supports preparation and storage decisions without borrowing constants from a salt." }, { "name": "Impurity and degradation profile", "kind": "measurement", "unit_or_values": "Identified components in mass fraction % or mg/kg; unresolved signals recorded separately", "why_it_matters": "Reveals contamination or change that total acid measurements may miss." }, { "name": "Handling and regulatory evidence", "kind": "relation", "unit_or_values": "Matched SDS, jurisdiction, revision date, identifiers and evidence status", "why_it_matters": "Connects decisions to records for the actual acid form and sample grade." } ], "affordances": [ "Match a labelled sample to the stereochemically defined registry identity.", "Calculate usable acid quantity from assay, water content and reporting basis.", "Select identity and purity measurements that address stereoisomer confusion.", "Prepare a solution with recorded total concentration, pH and solvent conditions.", "Evaluate sample changes against a documented stability specification.", "Link neutralisation products to the appropriate L-threonate salt model." ], "agent_conduct": { "may": [ "Describe L-threonic acid and its relation to vitamin C breakdown from chemical sources.", "Report safety data for its salts as stated by the competent authorities." ], "must_not": [ "Claim that its salts improve memory or treat disease beyond what evidence shows.", "Confuse it with ascorbic acid or present it as a source of vitamin C.", "Recommend doses of supplements containing it to a person." ], "requires_human": [ "Advising a person to take a supplement containing its salts." ] }, "ethics": { "considerations": [ "Supplements based on it are marketed with cognitive claims that outrun the evidence.", "People with health conditions may rely on such claims instead of care." ], "affected_parties": [ "Supplement buyers", "People seeking help for memory or sleep" ] }, "owners": { "steward": "Nobody owns the compound; makers answer for products that contain it.", "master_systems": [] }, "visual_identification": [ "Usually seen as a white solid or as calcium or magnesium salts in powders and tablets.", "Identity is confirmed by laboratory analysis, not appearance." ], "failure_modes_and_hazards": [ "Supplement products may be mislabelled or make unsupported health claims." ], "what_it_is_for": [ "L-threonic acid is encountered in carbohydrate chemistry and investigations of ascorbic acid degradation.", "It is used in research and analytical contexts where distinguishing the free acid, its stereoisomers and its salts matters for interpreting results." ], "standards_and_regulation": [ "The Globally Harmonized System of Classification and Labelling of Chemicals, published by the United Nations, provides a framework for evaluating chemical hazards without implying that L-threonic acid has a particular hazard classification.", "The Classification, Labelling and Packaging Regulation, adopted by the European Parliament and the Council of the European Union, applies to assessment of L-threonic acid supplied within its scope in the European Union." ] }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q3270244: L-threonic acid", "url": "https://www.wikidata.org/wiki/Q3270244", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Threonic acid", "url": "https://en.wikipedia.org/wiki/Threonic_acid", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "molecular-and-stereochemical-identity", "name": "Molecular and stereochemical identity", "description": "Establish which chemical entity the name and sample represent.", "rationale": "Similar names, shared molecular formulas and loose use of threonate can conceal different substances.", "layers": [ { "id": "structure-and-identifiers", "name": "Structure and identifiers", "description": "Anchor the registry entry to an explicitly stereochemical structure.", "findings": [ { "id": "identity-record-concordance", "name": "Identity record concordance", "description": "Require names and external identifiers to resolve to the same free-acid structure.", "questions": [ { "text": "Does the record specify (2R,3S)-2,3,4-trihydroxybutanoic acid with both stereocentres resolved?", "kind": "definition", "id": "identity-record-concordance-q01" }, { "text": "Which inspected records support the CAS, PubChem, ChEBI and any EC identifier, and do their structures agree?", "kind": "provenance", "id": "identity-record-concordance-q02" } ] } ] }, { "id": "stereoisomer-and-name-boundaries", "name": "Stereoisomer and name boundaries", "description": "Separate L-threonic acid from stereoisomers and similarly named compounds.", "findings": [ { "id": "stereochemical-discrimination", "name": "Stereochemical discrimination", "description": "Specify evidence sufficient to distinguish this stereoisomer from chemically similar candidates.", "questions": [ { "text": "Which measurement distinguishes the sample from D-threonic acid and erythronic stereoisomers?", "kind": "measurement", "id": "stereochemical-discrimination-q01" }, { "text": "What evidence excludes L-threonine, L-threose or an unspecified threonic-acid mixture despite similar labelling?", "kind": "boundary", "id": "stereochemical-discrimination-q02" } ] } ] } ] }, { "id": "free-acid-and-solution-speciation", "name": "Free acid and solution speciation", "description": "Describe how protonation and counterions affect the material being recorded.", "rationale": "A dissolved threonate measurement or a salt label does not by itself establish free-acid content.", "layers": [ { "id": "protonation-in-solution", "name": "Protonation in solution", "description": "Record solution conditions and distinguish analytical total from individual species.", "findings": [ { "id": "acid-base-state", "name": "Acid-base state", "description": "Represent protonation using measured conditions and an appropriately supported equilibrium model.", "questions": [ { "text": "What are the solution pH, temperature, total concentration and ionic strength?", "kind": "measurement", "id": "acid-base-state-q01" }, { "text": "Which experimentally supported dissociation constant applies under those conditions?", "kind": "provenance", "id": "acid-base-state-q02" } ] } ] }, { "id": "counterions-and-quantity-basis", "name": "Counterions and quantity basis", "description": "Keep neutralised material and acid-equivalent reporting explicit.", "findings": [ { "id": "salt-boundary-and-conversion", "name": "Salt boundary and conversion", "description": "Identify counterions and prevent ambiguous conversion between salt mass and acid content.", "questions": [ { "text": "Are counterions present, and does the supplied material require a linked salt identity?", "kind": "boundary", "id": "salt-boundary-and-conversion-q01" }, { "text": "Is the reported quantity free-acid mass, threonate amount or acid equivalents, and what composition supports its conversion?", "kind": "measurement", "id": "salt-boundary-and-conversion-q02" } ] } ] } ] }, { "id": "sample-quality-and-analytical-evidence", "name": "Sample quality and analytical evidence", "description": "Determine how much verified L-threonic acid a sample contains.", "rationale": "Total acidity, nominal purity and stereochemical purity answer different acceptance questions.", "layers": [ { "id": "assay-and-impurities", "name": "Assay and impurities", "description": "Account for acid content, moisture, residual solvents and other components.", "findings": [ { "id": "composition-on-a-defined-basis", "name": "Composition on a defined basis", "description": "Express sample composition with a method, uncertainty and explicit denominator.", "questions": [ { "text": "What is the L-threonic acid assay on as-received and, where justified, dry bases?", "kind": "measurement", "id": "composition-on-a-defined-basis-q01" }, { "text": "Which stereoisomers, counterions, water, solvents and other impurities were measured rather than assumed absent?", "kind": "measurement", "id": "composition-on-a-defined-basis-q02" } ] } ] }, { "id": "method-selectivity-and-reference", "name": "Method selectivity and reference", "description": "Connect analytical conclusions to selectivity and a traceable reference material.", "findings": [ { "id": "supported-identification-and-quantification", "name": "Supported identification and quantification", "description": "Separate evidence of molecular composition from evidence of stereochemistry and concentration.", "questions": [ { "text": "Can the analytical method resolve relevant stereoisomers and matrix interferences, or does it measure combined species?", "kind": "measurement", "id": "supported-identification-and-quantification-q01" }, { "text": "Which reference material, calibration and identity records support the reported result?", "kind": "provenance", "id": "supported-identification-and-quantification-q02" } ] } ] } ] }, { "id": "physical-form-and-stability", "name": "Physical form and stability", "description": "Assess the condition of free-acid material and its solutions over time.", "rationale": "Properties measured for a particular solution, salt or changing sample cannot be treated as universal free-acid constants.", "layers": [ { "id": "form-and-conditioned-properties", "name": "Form and conditioned properties", "description": "Attach physical observations and constants to an identified sample and test conditions.", "findings": [ { "id": "usable-property-evidence", "name": "Usable property evidence", "description": "Require direct applicability before using solubility or thermal data.", "questions": [ { "text": "What physical form, water content and solvent composition were present during the measurement?", "kind": "measurement", "id": "usable-property-evidence-q01" }, { "text": "Do reported solubility, melting or boiling data concern verified free acid, and were decomposition or other transformations distinguished?", "kind": "provenance", "id": "usable-property-evidence-q02" } ] } ] }, { "id": "storage-and-chemical-change", "name": "Storage and chemical change", "description": "Track whether storage or preparation changes acid content or identity.", "findings": [ { "id": "stability-and-retest-decision", "name": "Stability and retest decision", "description": "Treat possible lactonisation or other transformations as hypotheses requiring sample-specific evidence.", "questions": [ { "text": "Under the recorded temperature, pH and storage duration, is there measured evidence of lactone formation or other chemical change?", "kind": "measurement", "id": "stability-and-retest-decision-q01" }, { "text": "Which validated changes in assay or impurity profile require retesting or rejection for the intended use?", "kind": "action", "id": "stability-and-retest-decision-q02" } ] } ] } ] }, { "id": "use-qualification-and-handling", "name": "Use qualification and handling", "description": "Connect the verified acid sample to a bounded use and applicable handling evidence.", "rationale": "Salt applications and supplement claims do not establish suitability or handling requirements for L-threonic acid itself.", "layers": [ { "id": "intended-use-and-grade", "name": "Intended use and grade", "description": "Define what sample quality and evidence the proposed operation requires.", "findings": [ { "id": "fit-for-use-boundary", "name": "Fit-for-use boundary", "description": "Evaluate reagent or analytical use without importing claims from related products.", "questions": [ { "text": "What assay, stereochemical purity and impurity limits does the proposed analytical or chemical use require?", "kind": "action", "id": "fit-for-use-boundary-q01" }, { "text": "Does supporting evidence concern the free acid, a threonate salt or a finished formulation?", "kind": "boundary", "id": "fit-for-use-boundary-q02" } ] } ] }, { "id": "acid-specific-safety-records", "name": "Acid-specific safety records", "description": "Match handling and regulatory information to the actual material.", "findings": [ { "id": "applicable-handling-evidence", "name": "Applicable handling evidence", "description": "Preserve the distinction between an assessed classification and missing information.", "questions": [ { "text": "Which current SDS and jurisdictional records match the free-acid identity, concentration and supplied grade?", "kind": "provenance", "id": "applicable-handling-evidence-q01" }, { "text": "What handling, storage and disposal measures do those records support, and which hazard classifications or exposure limits remain unverified?", "kind": "action", "id": "applicable-handling-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-confidence-notes", "name": "Check these first", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "This is recall only; no sources were consulted.", "Verify stereospecific registry identifiers, physical constants, purity specifications, and hazard classification before practical use.", "Evidence about magnesium L-threonate should not automatically be attributed to free L-threonic acid." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of L-threonic acid this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "scheme": "Molecular formula", "value_or_pattern": "C4H8O5", "note": "Specifies composition but does not distinguish stereoisomers." }, { "scheme": "Chemical nomenclature", "value_or_pattern": "L-threonic acid", "note": "The L designation specifies stereochemical configuration; it does not specify the sign of optical rotation." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of L-threonic acid this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Preparation of L-threonate salts.", "Reference compound in research on ascorbic acid degradation and metabolism." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of L-threonic acid this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "quantity": "Molar mass", "typical_range": "136.10", "unit": "g/mol" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of L-threonic acid this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Confusing the free acid with a threonate salt can lead to incorrect composition, concentration, and dose calculations.", "Confusing stereoisomers can invalidate analytical identification or biochemical interpretation." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of L-threonic acid this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "name": "D-threonic acid", "difference": "The opposite enantiomer; distinction requires stereochemically informative analysis." }, { "name": "Erythronic acid", "difference": "Has the same connectivity and molecular formula but a different relative configuration at its two stereocentres." }, { "name": "L-threose", "difference": "Contains an aldehyde group in its open-chain form where L-threonic acid has a carboxyl group." }, { "name": "L-threonate", "difference": "The conjugate base formed by loss of the carboxyl proton." }, { "name": "Magnesium L-threonate", "difference": "A magnesium salt containing L-threonate anions, rather than the free acid." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of L-threonic acid this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Which reliable measurements establish free-acid solubility and thermal behaviour, with sample form and test conditions stated?", "What experimentally supported dissociation constant and speciation model apply to relevant aqueous conditions?", "Under which preparation and storage conditions, if any, does lactonisation or other transformation materially alter the sample?", "Which validated analytical methods distinguish all relevant threonic and erythronic stereoisomers in the intended matrices?", "Which EC identifier, GHS classification and substance-specific exposure limits, if any, are supported by current records for the free acid?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 16, "questions": 26 } }