methanol
Enable an AI agent to recognise methanol, assess the condition and suitability of a particular quantity, and determine which handling or use decisions require further evidence.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
recalled by Codex without web access - no source was read
Researched by: Codex
Purpose and description
Enable an AI agent to recognise methanol, assess the condition and suitability of a particular quantity, and determine which handling or use decisions require further evidence.
Methanol (CH3OH) is the simplest alcohol, a molecular substance that is a colorless, volatile, flammable and toxic liquid at ordinary room temperature and atmospheric pressure.
It can be Resolve a substance label to methanol identity using documented identifiers and analytical evidence.; Compare a lot's assay, water content and impurities with a specified use requirement.; Assess phase and vapour-related constraints at a stated temperature and pressure.; Flag proposed handling when exposure, ignition or material-compatibility evidence is missing.; Determine whether resampling or retesting is needed before relying on an earlier certificate.; Separate verified chemical quality from independently evidenced production-origin claims..
Distinguishing features
Chemical identity must match CH3OH, the one-carbon alcohol, rather than ethanol, isopropanol or another alcohol.
Identity testing must distinguish methanol from other clear liquids; appearance and odour do not establish identity.
A methanol-containing mixture must be distinguished from a methanol substance quantity with declared impurities and grade.
A production-route label such as renewable methanol describes provenance and does not establish a different molecular identity.
A grade label must be supported by measured composition and an applicable specification; it does not by itself establish suitability.
Scope
+ Chemical identity, identifiers and differentiation from other alcohols
+ Methanol content, water content, impurities and grade evidence
+ Physical phase and properties under stated conditions
+ Toxicity, flammability, exposure and compatibility constraints
+ Provenance and suitability of a methanol quantity for a specified use
- Formulations, fuels and other products containing methanol as an ingredient
- Methanol production plants and manufacturing process models
- Containers, storage installations and transport vehicles
- Clinical diagnosis and treatment of methanol poisoning
- Complete reactor, engine or fuel-cell operating procedures
Characteristics
- Chemical identity
- CH3OH; verified CAS number, PubChem CID and EC number with source Connects the quantity to the correct substance and prevents confusion with other alcohols.
- Methanol assay
- Mass fraction or amount fraction; method, uncertainty and sampling date Establishes composition without confusing incompatible percentage bases.
- Water content
- mg/kg or mass percent; analytical method and sampling date Water content can determine whether methanol meets an intended analytical, synthesis or fuel specification.
- Impurity profile
- Named impurities and concentrations with units, detection limits and methods Trace contaminants can invalidate a grade or interfere with a downstream application.
- Declared grade
- Supplier grade and named specification with edition Makes grade claims testable against explicit acceptance criteria.
- Physical condition
- Phase, temperature in °C or K, and absolute pressure in kPa Phase and physical-property values require operating conditions.
- Phase-transition temperatures
- Melting and boiling temperatures in °C or K at stated pressure and purity Supports phase assessment without treating reference values as unconditional.
- Density and vapour pressure
- kg/m³ and kPa at stated temperature, composition and method Supports quantity conversion and assessment of vapour formation.
- Flammability properties
- Flash point in °C with test method; flammable limits in volume percent under stated conditions Provides evidence for evaluating ignition and atmosphere constraints.
- Hazard classification
- Applicable GHS implementation, hazard classes, categories and statements with jurisdiction and revision Connects methanol hazards to the classification actually applicable to the quantity.
- Exposure criteria
- ppm or mg/m³; averaging period, skin notation, authority and effective date Prevents comparison of an exposure measurement with an unrelated limit.
- Lot and production provenance
- Supplier, lot, certificate of analysis and supported production-route claims Connects quality and origin assertions to evidence for the actual material.
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 19 findings · 31 questions.
Methanol identity Establishes which chemical substance is present and where the registry boundary lies.
Confusion with other alcohols or methanol-containing products changes both permitted uses and hazard decisions.
Molecular and regulatory identity
Connects the molecular identity to independently verified substance records.
Identity evidence
Record CH3OH identity together with authoritative identifiers and evidence identifying the actual sample.
- Which authoritative records establish the CAS number, PubChem CID and EC number for methanol? provenance
- What analytical evidence distinguishes this sample from ethanol, isopropanol or a mixture of alcohols? measurement
Substance and product boundary
Separates methanol identity from formulations, impurities and origin labels.
Registered substance boundary
Record whether the quantity is supplied as methanol or is a separately modelled formulation containing methanol.
- Is the material methanol with declared impurities, or an intentional formulation requiring a product model? boundary
- Does any renewable, bio-based or synthetic label describe production provenance rather than chemical identity? definition
Methanol composition and grade Makes purity and grade claims assessable for a specific quantity.
Methanol identity alone cannot establish suitability when water and trace contaminants matter.
Assay, water and impurities
Records composition using explicit analytical methods and reporting bases.
Measured composition
Keep methanol assay, water content and impurity results distinct, including uncertainty and detection limits.
- What are the measured methanol assay and water content, and on which concentration bases are they reported? measurement
- Which impurities were tested, and what methods and detection limits support the reported results? measurement
Grade and lot evidence
Links a supplier's grade claim to lot-specific results and acceptance criteria.
Grade conformance
Treat a grade as a claim against an identified specification, supported by evidence for the lot.
- Which specification and edition define this methanol grade, including water and impurity limits? definition
- Does the certificate of analysis identify this lot and demonstrate compliance with every relevant criterion? provenance
Methanol physical state Describes phase, physical properties and changes in the material's condition.
Reference constants cannot establish the behaviour of methanol without temperature, pressure and composition.
Phase and property conditions
Binds physical-property evidence to the conditions under which it applies.
Conditioned property values
Record phase-transition temperatures, density and vapour pressure with units, conditions and sources.
- At the quantity's temperature, absolute pressure and composition, which phase or phases are expected? measurement
- Which sourced melting point, boiling point, density and vapour-pressure data apply to those conditions? provenance
Condition since certification
Assesses whether storage and handling history undermine earlier composition evidence.
Sample representativeness
Connect current suitability to evidence about opening, transfer, moisture exposure and possible contamination.
- What opening, transfer or storage events could have changed water content or introduced contaminants since analysis? provenance
- What sampling and retesting are needed to establish that the recorded composition still represents this quantity? action
Methanol hazards and handling Connects methanol-specific toxicity and flammability evidence to proposed handling.
An agent needs explicit evidence about exposure routes, ignition conditions and compatibility before assessing an action.
Toxicity and exposure
Records applicable health classifications and exposure criteria without substituting for clinical care.
Route-specific health constraints
Capture evidence concerning ingestion, inhalation and skin exposure, including serious systemic effects and applicable exposure limits.
- Which authoritative hazard assessment documents methanol's health effects and relevant exposure routes? provenance
- Which occupational limits, averaging periods and skin notations apply in the intended jurisdiction? measurement
- Does the proposed handling have adequate exposure-assessment evidence for each relevant route? action
Ignition and compatibility
Links flammability properties and chemical compatibility to the intended conditions.
Handling envelope
Record applicable flash-point and flammable-limit evidence alongside compatibility requirements for contacting materials and chemicals.
- Which flash-point method and flammable-limit conditions support assessment of this methanol quantity? measurement
- What evidence establishes compatibility with the proposed wetted materials and contacting chemicals? provenance
- Which unresolved ignition, ventilation or compatibility conditions prevent authorising the proposed transfer or use? action
Methanol use and provenance Assesses application suitability and traces claims beyond molecular identity.
Chemical conformance, regulatory acceptability and production-origin claims answer different questions and require separate evidence.
Application-specific suitability
Relates a methanol quantity to explicit requirements of a neighbouring application model.
Intended-use conformance
Evaluate use as a solvent, feedstock or fuel component against the receiving application's documented requirements.
- Which methanol assay, water, impurity and documentation requirements does the intended application impose? boundary
- Does the available evidence support this use, require additional testing or establish nonconformance? action
Origin and jurisdiction
Tracks production claims and the regulatory records relevant to a particular supply context.
Traceable supply claims
Link the lot to current jurisdictional documentation and independently supported origin or emissions claims.
- Which safety data sheet, regulatory identity records and transport classification apply to this supply form and jurisdiction? provenance
- What chain-of-custody and assessment-boundary evidence supports any renewable-origin or emissions claim for this lot? provenance
Evidence and external alignment What the world already says about this thing, gathered so the model can be checked against it.
A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.
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.
- This is recall, not source-verified research; physical constants are approximate and refer to pure methanol under the stated conditions.
- Verify current jurisdiction-specific hazard classifications, exposure limits and product restrictions before regulatory use.
- Grade names do not establish a universal purity specification; check water content, impurities and the supplier's certificate of analysis.
- Which of these check these first hold for the sense of methanol this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Technical-grade methanol
- Reagent-grade methanol
- HPLC-grade methanol
- LC-MS-grade methanol
- Anhydrous methanol
- Which of these kinds and varieties hold for the sense of methanol this model covers, and on what evidence? provenance
Identifiers and schemes
Recalled without web access and unsourced; every item is a lead to verify.
- CAS Registry Number - 67-56-1 - Identifies methanol as a substance, not a particular commercial grade.
- PubChem CID - 887 - Compound identifier for methanol.
- EC number - 200-659-6 - European substance inventory identifier.
- UN number - UN 1230 - Dangerous-goods transport identifier for methanol; mixtures require separate assessment.
- Which of these identifiers and schemes hold for the sense of methanol this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- United Nations Globally Harmonized System of Classification and Labelling of Chemicals (GHS): framework for communicating flammability, acute toxicity and target-organ hazards.
- European Union Classification, Labelling and Packaging Regulation (CLP): governs substance and mixture classification and labelling in the EU.
- European Union REACH Regulation, administered with the European Chemicals Agency (ECHA): governs registration and other chemical obligations.
- US Occupational Safety and Health Administration (OSHA) Hazard Communication Standard: governs workplace hazard communication.
- Which of these standards and regulation hold for the sense of methanol this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Chemical feedstock for producing formaldehyde, acetic acid and other chemicals.
- Solvent in chemical processing and laboratory analysis.
- Reactant in biodiesel production by transesterification.
- Fuel and fuel-blending component.
- Component of some antifreeze and windshield-washer formulations.
- Which of these real-world use hold for the sense of methanol this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Molar mass - 32.04 - g/mol
- Melting point of pure methanol near atmospheric pressure - approximately -97.6 - °C
- Normal boiling point at 101.325 kPa - approximately 64.7 - °C
- Liquid density at 20 °C - approximately 0.792 - g/cm³
- Closed-cup flash point - approximately 11-12, depending on test method - °C
- Which of these typical measurements hold for the sense of methanol 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.
- Liquid and vapor ignite readily; vapor mixed with air can create an explosive atmosphere.
- Exposure through ingestion, inhalation or skin absorption can cause systemic poisoning.
- Metabolism to toxic products can cause metabolic acidosis, optic-nerve injury, blindness and death; serious effects may be delayed.
- Flames can be difficult to see in daylight, complicating fire detection.
- Water uptake and other contamination can make material unsuitable for applications requiring controlled purity.
- Which of these failure modes and hazards hold for the sense of methanol this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Workplace exposure limits, averaging periods and skin notations differ by jurisdiction and issuing body.
- Restrictions on methanol-containing consumer products vary by jurisdiction and product category.
- Hazard labels and safety-data-sheet requirements depend on the jurisdiction's implementation of chemical classification rules.
- Which of these regional variation hold for the sense of methanol 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.
- ethanol - Ethanol has two carbon atoms and formula C2H5OH; methanol has one and formula CH3OH.
- methane - Methane is CH4 and lacks the hydroxyl group that makes methanol an alcohol.
- formaldehyde - Formaldehyde is the aldehyde CH2O, with a carbonyl group rather than methanol's alcohol group.
- methanol-containing formulation - A formulation is a mixture with specified ingredients and concentrations; methanol names the individual chemical substance.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of methanol this model covers, and on what evidence? provenance
What the second pass must settle
- Which authoritative identity and property sources should anchor verified identifiers and numerical constants, including measurement conditions?
- Which jurisdictions and effective dates must the model cover for hazard classifications, exposure limits and transport requirements?
- Which methanol grades and application specifications are required, and what water and impurity limits distinguish them?
- What evidence and acceptance criteria should trigger retesting after storage, opening or transfer?
- Does the existing world-model catalogue already cover methanol, requiring vr.tr.methanol to link to that publication instead of creating a duplicate?