p-chlorophenol
Enable an agent to recognise p-chlorophenol, assess the identity and condition of a sample, and determine which handling or use decisions require further evidence.
Bundle → Layer → Finding → Questions Filled
7 bundles · 13 layers · 20 findings · 33 questions
Para-isomer identity Establish the specific molecular identity behind the p-chlorophenol name.
Molecular recognition
Require evidence of the para relationship between chlorine and hydroxyl.
Substitution pattern
Recognition must resolve substitution position rather than merely match elemental composition.
- Does the represented structure place chlorine at position 4 relative to the phenolic hydroxyl? definition
- Which analytical evidence distinguishes this sample from 2-chlorophenol and 3-chlorophenol? measurement
Identifier and form boundaries
Reconcile names and identifiers while distinguishing parent substance, salts and products.
Record reconciliation
Supplier names and database identifiers must resolve to the same structure and supplied chemical form.
- Which authoritative record supports the CAS, EC and PubChem identifiers used for this material? provenance
- Is the supplied material neutral p-chlorophenol, a chlorophenolate salt or a formulation containing it? boundary
Lot composition and fitness Describe the actual material rather than assume the nominal identity guarantees purity.
Assay and isomer resolution
Interpret purity using methods capable of resolving relevant contaminants.
Qualified purity
A purity claim needs its reporting basis, method and demonstrated separation from other chlorophenols.
- Is the stated p-chlorophenol assay a mass fraction, dry-basis result or chromatographic area percentage? measurement
- Does the method separately quantify ortho- and meta-chlorophenol, and what are its reporting limits? measurement
Condition and use acceptance
Connect lot history and measured contaminants to a defined acceptance decision.
Lot suitability
Suitability is specific to the proposed use and supported by lot-level evidence.
- What water, residual solvent and other impurity measurements accompany this lot's certificate? provenance
- Which acceptance criteria determine whether this lot may be used, retested or rejected? action
- Have storage or sampling conditions changed since the supporting analysis? provenance
Phase and property envelope Relate physical properties to the temperature, pressure and composition actually encountered.
Solid-liquid transition
Interpret observed phase and thermal behaviour at sample conditions.
Phase consistency
Observed phase must be assessed alongside temperature, purity and measured melting behaviour.
- At what temperature and pressure was the sample observed as solid, liquid or partly molten? measurement
- Is its measured melting range consistent with the reference and its impurity profile? measurement
Conditioned property values
Qualify volatility, boiling and density values before using them in a decision.
Property applicability
A reference constant is usable only within its documented conditions and uncertainty.
- What temperature, pressure, phase and source accompany each vapour-pressure, density and boiling-point value? provenance
- Does a proposed heated operation require property data beyond the verified temperature range? action
Solution and reactivity Capture dissolution, ionisation and compatibility relevant to p-chlorophenol.
Dissolution and ionisation
Separate neutral-substance solubility from total dissolved material and ionised species.
Solution state
Dissolved concentration must specify solvent, temperature, pH and the species included in the result.
- Does the reported concentration measure neutral p-chlorophenol or total p-chlorophenol equivalents? definition
- What solvent, temperature, pH and supported acid-base data justify the stated dissolved fraction? measurement
Compatibility and transformation
Require evidence before contact with reagents or exposure to decomposition conditions.
Reactivity screen
Oxidant incompatibility is a documented concern; proposed contacts need condition-specific assessment. [ICSC 0850](https://inchem.org/documents/icsc/icsc/eics0850.htm)
- Which compatibility evidence covers the proposed reagents, contact materials and operating temperature? provenance
- Could the proposed operation transform p-chlorophenol into another substance requiring a linked model? boundary
Exposure and environment Connect material form and release pathways to supported hazard assessment.
Route-specific exposure
Assess exposure pathways for crystals, dust, heated liquid and solutions.
Exposure-control evidence
Skin absorption and irritation are documented concerns that must inform task-specific controls. [ICSC 0850](https://inchem.org/documents/icsc/icsc/eics0850.htm)
- Which inhalation, skin, eye or ingestion pathways are credible for the proposed operation? action
- What evidence supports the selected containment and protective-material compatibility for its concentration and temperature? provenance
Release and fate
Track p-chlorophenol entering water, soil or waste without assuming disappearance means destruction.
Environmental accounting
Aquatic toxicity is documented; release and treatment decisions need quantified substance-specific evidence. [ICSC 0850](https://inchem.org/documents/icsc/icsc/eics0850.htm)
- What mass and concentration of p-chlorophenol could reach each receiving medium? measurement
- Does treatment evidence distinguish chemical destruction from transfer into sludge, sorbent or another phase? boundary
Regulatory and decision evidence Qualify classifications and permissions by jurisdiction, date and supplied form.
Classification and limits
Maintain traceable hazard classifications and exposure criteria without inventing absent values.
Applicable hazard record
Current classification and exposure-limit claims require an applicable authoritative source.
- Which current jurisdiction-specific GHS classification applies to the substance or supplied mixture? provenance
- Is an occupational limit established for p-chlorophenol, and what averaging period and skin notation apply? measurement
Operation-specific disposition
Translate verified evidence into use, storage, shipment or disposal decisions.
Decision readiness
Disposition depends on actual composition, physical form, location and the operation requested.
- Which current transport and waste classifications apply to this material's form and concentration? boundary
- What missing evidence prevents authorising the proposed use, shipment or disposal route? action
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
Reported evidence
Findings from the breadth pass, kept separate from the structural claims.
Check these first
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these check these first hold for the sense of p-chlorophenol this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these identifiers and schemes hold for the sense of p-chlorophenol this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these standards and regulation hold for the sense of p-chlorophenol this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these real-world use hold for the sense of p-chlorophenol this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these typical measurements hold for the sense of p-chlorophenol this model covers, and on what evidence? provenance
Failure modes and hazards
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these failure modes and hazards hold for the sense of p-chlorophenol this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these regional variation hold for the sense of p-chlorophenol this model covers, and on what evidence? provenance
Neighbouring kinds and how to tell them apart
Recalled without web access and unsourced; every item is a lead to verify.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of p-chlorophenol this model covers, and on what evidence? provenance
Classifiers Filled
- Family
- Thing Registry
- Category
- Physical world and living systems
- Entry kind
- thing
- Plane
- PHY
- Domain
- PHY.MAT
What it is Filled
p-Chlorophenol, also called 4-chlorophenol, is the positional isomer of monochlorophenol in which chlorine is attached to the benzene ring opposite the hydroxyl group, with molecular formula C6H5ClO.
In scope
- Para-substituted molecular identity and authoritative identifiers
- Sample grade, assay, positional-isomer impurities and water content
- Physical properties with measurement conditions and uncertainty
- Dissolution, acid-base speciation and chemical compatibility
- Substance-specific exposure, environmental and regulatory evidence
Out of scope
- Separate models of 2-chlorophenol and 3-chlorophenol
- Chlorophenolate salts as independently supplied substances
- Formulated disinfectants, solutions and other products containing p-chlorophenol
- Manufacturing processes and reaction equipment
- Clinical treatment protocols and facility-wide waste management
Why it exists Filled
Enable an agent to recognise p-chlorophenol, assess the identity and condition of a sample, and determine which handling or use decisions require further evidence.
Distinguishing features Filled
- The chlorine substituent occupies ring position 4 relative to the phenolic hydroxyl group; structural evidence must distinguish it from the ortho and meta isomers. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/4-Chlorophenol)
- CAS 106-48-9 and PubChem CID 4684 identify this entry; the formula C6H5ClO alone cannot establish positional identity. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/4-Chlorophenol)
- The identity requires one ring chlorine and a phenolic hydroxyl group, distinguishing it from phenol, more highly chlorinated phenols and chlorinated phenyl ethers.
- A supplied salt or formulated mixture must be distinguished from the neutral substance, even when its label uses the parent name.
- A melting point near the reported 43 °C is supporting evidence only; temperature, impurities and independent identity evidence must accompany interpretation. [ICSC 0850](https://inchem.org/documents/icsc/icsc/eics0850.htm)
What robots and AI may and may not do Filled
Must not
- Handle it without the protective equipment its safety data sheet requires.
- Discharge it or its waste to drains, soil or water.
- Transfer it to people not authorized to hold hazardous chemicals.
- Store it in unmarked or incompatible containers.
Only with a human decision
- Cleaning up a spill or deciding how contaminated material is disposed of.
May
- Read labels and safety data sheets and report the identity and hazards of 4-chlorophenol.
- Track stock and waste in an authorized laboratory or plant inventory.
- Report spills or leaks to the responsible safety officer.
Moral aspects Filled
- Chlorophenols are toxic and persist in water, harming people and wildlife downstream.
- Workers handling it bear the health risk of poor controls.
Who is affected
- Laboratory and plant workers
- Aquatic life
- Communities downstream
Owners Filled
Steward
The laboratory or company that holds it; environmental and workplace safety authorities regulate it.
Links to other meta-models Filled
parent
- Q48995664 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.p-chlorophenol
- Wikidata: Q2179668 (https://www.wikidata.org/wiki/Q2179668)
Direct properties required Filled
- Substance identifiers: vr.tr.p-chlorophenol; CAS 106-48-9; PubChem CID 4684; EC 203-402-6
- Molecular composition: C6H5ClO; molar mass 128.55 g/mol
- Assay and impurity profile: Mass % or chromatographic area %, explicitly distinguished; water and individual impurities in mass % or mg/kg
- Sample phase: Crystalline solid, liquid, solid-liquid mixture or dissolved; temperature in °C and pressure in kPa
- Thermal transition evidence: °C; ICSC reference melting point 43 °C and boiling point 220 °C; record pressure and method
- Aqueous solubility: g/L with temperature, pH and chemical form; ICSC reports 2.7 g/100 mL at 20 °C
- Acid-base speciation: Neutral phenol fraction and chlorophenolate fraction; pH and supported pKa under stated conditions
- Vapour pressure: Pa at specified temperature; ICSC reference 13 Pa at 20 °C
- Hazard and exposure-limit status: GHS classes and statements, jurisdiction, source revision; applicable limits in ppm or mg/m³ with averaging period and skin notation
Recognition required Filled
- A white to pale crystalline solid with a strong medicinal phenol odour.
- Identity is confirmed by the label and analysis.
Capabilities and actions required Filled
- Resolve a supplier or analytical record to the para isomer and flag identity conflicts.
- Assess whether a lot meets a specified purity and positional-isomer limit.
- Determine whether recorded temperature and composition support the observed phase.
- Evaluate a proposed dissolution or transfer against verified properties and compatibility evidence.
- Identify missing exposure controls or regulatory evidence before a proposed use.
- Connect a release or waste stream to p-chlorophenol-specific assessment requirements.
Hazards and failure modes required Filled
- Harmful by skin contact and swallowing, and irritating to eyes.
- Toxic to aquatic life if released.
Standards and interfaces required Filled
- Globally Harmonized System of Classification and Labelling of Chemicals, United Nations.
Context of use required Filled
- p-Chlorophenol is encountered in chemical synthesis as an intermediate and in laboratories as an analytical reference substance.
- It is also relevant to environmental analysis when investigating chlorophenol contamination in water, soil or industrial waste streams.
Sources Filled
- Wikidata item Q2179668: p-chlorophenol - identity and sense of the item
- Wikipedia: 4-Chlorophenol - general description of the item
Open questions
- Does an existing Vercy world model already cover this exact substance, requiring a registry link instead of a separate publication?
- Which current authoritative GHS classifications, occupational exposure limits and transport requirements apply in the intended jurisdictions?
- What primary measurements establish pKa, pH-dependent solubility and partitioning under the intended solution conditions?
- Which analytical methods and impurity thresholds adequately distinguish acceptable p-chlorophenol lots for the intended uses?
- How should conflicting reference descriptions of combustibility be reconciled using primary test data and current authoritative safety documentation?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q2179668/spec.json