oil
a slippery or viscous liquid or liquefiable substance not miscible with water
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 agent to recognise an oil, assess its condition and determine whether it is suitable for a specified use under stated conditions.
Oil is a broad class of predominantly hydrophobic liquids or readily liquefiable substances that do not form a single homogeneous phase with water in all proportions and commonly exhibit a slippery feel, rather than a single chemical substance or composition.
It can be Classify a sample provisionally and identify the evidence needed to confirm its oil family and grade.; Compare a batch's measured properties with a specified application requirement.; Determine whether conditioning, filtration or water separation is a candidate action requiring validation.; Track contamination and degradation against a documented baseline.; Select handling and storage conditions supported by the identified oil's documentation.; Assess eligibility for reuse, reprocessing or disposal using composition, condition and applicable requirements..
Distinguishing features
Assess water miscibility under stated temperature, proportions and mixing conditions; temporary dispersion or emulsification does not establish miscibility.
Confirm a slippery or viscous liquid state, or a documented transition to liquid, under relevant conditions; appearance alone cannot establish oil identity.
Use composition and grade evidence to distinguish oil from aqueous lubricants or other slippery liquids.
Record whether the material is bulk oil, oil dispersed in an emulsion, or oil incorporated into a structured product such as grease.
Distinguish the broad oil class from narrower families such as palm oil and from individual chemical substances; the name 'oil' alone does not establish composition.
Scope
+ Oil family, constituent composition, additives, grade and batch identity
+ Liquid or liquefiable state, viscosity and water interaction under specified conditions
+ Properties governing lubrication, heat transfer, combustion or other intended functions
+ Contamination, degradation and remaining fitness for use
+ Material-specific hazards, storage constraints and recovery eligibility
- Extraction, refining and synthesis processes as operational systems
- Machines, reservoirs and pipelines that contain or transport oil
- Finished foods, cosmetics, medicines and other products containing oil
- Palm oil's botanical origin and production-specific distinctions
- Oil markets, ownership rights and commodity trading
- Spill response operations and waste-treatment facilities
Characteristics
- Oil family
- Biological fixed oil, essential oil, petroleum-derived oil, synthetic oil, blend, other or unresolved Guides which composition evidence and suitability tests are relevant without assuming all oils share one chemistry.
- Composition and additives
- Constituent mass fractions or concentration ranges, with analytical method and unknown fraction Determines whether properties and restrictions from a reference material apply to this oil.
- Grade and intended-use specification
- Named specification, version, declared use and supporting conformity evidence Separates material identity from demonstrated suitability for a particular application.
- Chemical and batch identifiers
- Applicable CAS, EC or PubChem identifiers; supplier, product and lot references Connects evidence to the actual substance, mixture or batch without assigning a universal chemical identifier to oil.
- Phase and flow condition
- Liquid, partly crystallised, solidified or unresolved, with temperature in °C and pressure in kPa Establishes whether the material can flow and whether heating or other conditioning is required.
- Viscosity
- Kinematic viscosity in mm²/s or dynamic viscosity in mPa·s, with temperature and applicable shear conditions Supports pumping, dosing and lubrication decisions.
- Water interaction
- Separate phases, persistent emulsion, partial dissolution or unresolved, with test conditions Supports recognition and predicts separation or contamination problems.
- Water content
- mg/kg or mass %, with method and dissolved, dispersed or free-water distinction where established Helps assess contamination and application-specific suitability.
- Density
- kg/m³ at stated temperature Supports mass-volume conversion and phase-separation assessment without assuming every oil floats on water.
- Thermal operating indicators
- Applicable flash point, pour point, cloud point or phase-transition range in °C, each with method Constrains handling and use while keeping distinct thermal measurements separate.
- Degradation indicators
- Application-appropriate results such as acid value in mg KOH/g, peroxide value in meq O₂/kg, or viscosity change in % Provides evidence of condition change using indicators appropriate to the oil family.
- Hazard and restriction status
- Current material-specific safety documentation, applicable classifications and use restrictions, with jurisdiction and date Prevents broad class membership from being treated as evidence of safety or permission to use.
Analytical facets
- substance
- material
- origin
- natural
- agency
- inert
- mobility
- varies
- scale
- not-applicable
- affordances
- observable
Also called
+73
Where this came from
oewn:2024 · CC BY 4.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 19 findings · 29 questions.
Oil identity and composition Establishes what kind of oil is present and which material the evidence describes.
Oil denotes a broad material class, so its name cannot supply a unique composition, identifier or permitted use.
Family and boundary
Separates oil-family identification from neighbouring material and product concepts.
Establish oil family
Record the evidence supporting classification and distinguish bulk oil from an oil-containing product.
- What composition or origin evidence supports the proposed oil family? definition
- Is the subject bulk oil, an oil phase within an emulsion, or a finished product containing oil? boundary
Composition and traceability
Connects constituents, additives and grade declarations to an identifiable material or batch.
Bind evidence to material
Record composition uncertainty and the scope of supplier, analytical and identifier records.
- Which constituents and additives are documented, at what concentrations, and what fraction remains unresolved? measurement
- Which identifiers, supplier records and lot-specific analyses actually apply to this oil? provenance
Phase, flow and water Describes the conditions under which the oil flows and how it interacts with water.
Liquefaction, viscosity and water separation are central to recognising and handling oil, but require stated test conditions.
Temperature-dependent flow
Records phase behaviour and resistance to flow over relevant temperatures.
Establish flow window
Connect viscosity and phase observations to actual transfer or operating conditions.
- What viscosity is measured at the proposed operating temperature, and by which method? measurement
- At what conditions does crystallisation or solidification interfere with the required flow? measurement
Water partition and dispersion
Distinguishes miscibility, emulsification and water contamination.
Characterise water interaction
Record water content and phase behaviour without equating a mixed appearance with dissolution.
- After mixing with water under specified conditions, does the sample separate, form a persistent emulsion or show measurable dissolution? measurement
- How much water is present, and is it dissolved, dispersed or a separate phase? measurement
Grade and functional fitness Links intended functions to explicit specifications and compatibility evidence.
An oil's suitability for one function does not establish its suitability for another.
Application requirements
Defines the function and evidence required for accepting the oil.
Match grade to use
Compare documented grade and measured performance with the proposed application.
- Which intended function and specification define acceptance for this oil? definition
- What test or conformity evidence shows that this batch meets those requirements? provenance
Contact and blend compatibility
Addresses interactions with other oils and materials encountered during use.
Validate contact and mixing
Require relevant evidence before substitution, topping up or contact with application materials.
- What evidence establishes compatibility with the seals, coatings and other materials this oil will contact? provenance
- Can this oil be blended with the existing oil while preserving the required properties and grade? action
Condition and degradation Tracks changes arising from storage, exposure and service.
Oil can retain its identity while contamination or chemical change makes it unsuitable for its intended function.
Exposure and baseline
Connects current condition to initial measurements and known exposure history.
Trace condition change
Select degradation indicators appropriate to the identified oil and application.
- What storage or service exposure to heat, air, light and moisture is documented? provenance
- Which relevant indicators have changed from the fresh-oil baseline, and by how much? measurement
Contamination and treatment
Distinguishes removable contaminants from changes that require another disposition.
Assess condition recovery
Evaluate treatment candidates against measured defects and post-treatment acceptance criteria.
- Which foreign solids, fluids or other contaminants are detected, and at what concentrations? measurement
- What treatment, if any, could restore the required properties, and what verification would be required before reuse? action
Handling, hazards and disposition Connects the identified oil and its condition to handling constraints and end-of-use decisions.
Hazards and recovery options depend on composition, exposure conditions and contamination rather than on the word oil.
Material-specific handling
Records applicable hazard evidence and operational limits.
Establish handling constraints
Use current documentation and relevant measurements to determine storage and handling requirements.
- Which current hazard classifications and exposure limits, if applicable, cover this composition and handling form? provenance
- What temperature, ignition-control and containment requirements follow from the documented properties and proposed operation? action
Reuse and end of use
Determines supported routes once the oil leaves its current application.
Determine disposition eligibility
Connect used-oil composition and contamination to acceptance requirements for its next destination.
- What use history and analytical evidence establish the identity and contamination status of the used oil? provenance
- Which reuse, reprocessing or disposal route accepts this oil under the applicable local requirements? action
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 recalled knowledge, not source-verified research; standard editions and applicability should be checked before use.
- Oil has no universal formula, CAS number, melting point, boiling point or hazard classification; composition, grade and measurement conditions must be established first.
- The listed kinds are practical categories rather than a single exclusive chemical taxonomy; viscosity, slipperiness and water immiscibility alone do not uniquely identify an oil.
- Which of these check these first hold for the sense of oil this model covers, and on what evidence? provenance
Kinds and varieties
Recalled without web access and unsourced; every item is a lead to verify.
- Vegetable oils, including palm oil
- Animal oils
- Petroleum-derived mineral oils
- Synthetic hydrocarbon oils
- Silicone oils
- Essential oils
- Which of these kinds and varieties hold for the sense of oil 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 - Two to seven digits, a hyphen, two digits, a hyphen, and one check digit - Specific constituents and some defined oil mixtures have CAS numbers; generic oil has no single CAS identity.
- PubChem CID - An integer identifying a compound record - Useful for identified molecular constituents; a constituent CID does not identify an entire variable-composition oil.
- Which of these identifiers and schemes hold for the sense of oil this model covers, and on what evidence? provenance
Standards and regulation
Recalled without web access and unsourced; every item is a lead to verify.
- ISO 3448, issued by the International Organization for Standardization, classifies industrial liquid lubricants by viscosity grade.
- ASTM D445, issued by ASTM International, specifies determination of kinematic viscosity of transparent and opaque liquids.
- Codex CXS 210-1999, issued by the Codex Alimentarius Commission, specifies requirements for named vegetable oils.
- The United Nations Globally Harmonized System of Classification and Labelling of Chemicals provides a hazard classification framework; classifications depend on the particular oil and its composition.
- Which of these standards and regulation hold for the sense of oil this model covers, and on what evidence? provenance
Real-world use
Recalled without web access and unsourced; every item is a lead to verify.
- Lubrication and reduction of friction and wear
- Hydraulic power transmission and heat transfer
- Food preparation and manufacture using suitable edible grades
- Fuel production and combustion
- Ingredients or carriers in coatings, cosmetics and fragrances
- Which of these real-world use hold for the sense of oil this model covers, and on what evidence? provenance
Typical measurements
Recalled without web access and unsourced; every item is a lead to verify.
- Density of many common vegetable and mineral oils near room temperature - Approximately 0.8-0.95; not a defining limit for all oils - g/cm³
- Kinematic viscosity - Strongly dependent on composition and temperature; report the measurement temperature, commonly 40 or 100 °C for lubricants - mm²/s
- Flash point - No meaningful class-wide range; composition and test method must be specified - °C
- Acid value - Depends on oil type, refining and degradation; particularly useful for fatty oils - mg KOH/g
- Which of these typical measurements hold for the sense of oil 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.
- Oxidation can cause rancidity in edible oils and sludge, deposits or viscosity changes in lubricants.
- Combustible oils can ignite when sufficiently heated; oil-soaked porous materials can self-heat with some oxidatively drying oils.
- Water, particles or incompatible fluids can impair lubrication, hydraulic operation or storage stability.
- Spills create slipping hazards and can harm aquatic habitats through coating, oxygen-transfer interference or constituent toxicity.
- Toxicity, irritation and aspiration hazards vary by composition; suitability for eating or skin contact cannot be inferred from the name oil.
- Which of these failure modes and hazards hold for the sense of oil this model covers, and on what evidence? provenance
Regional variation
Recalled without web access and unsourced; every item is a lead to verify.
- Food-grade specifications, permitted additives and labeling requirements vary by jurisdiction.
- Chemical hazard labeling and waste-oil handling requirements depend on local implementation and the particular oil.
- Which of these regional variation hold for the sense of oil 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.
- Palm oil - A specific vegetable oil obtained from oil-palm fruit; it adds botanical origin and a characteristic composition to the broader oil category.
- Fat - In ordinary lipid terminology, fats are relatively solid and oils relatively liquid at a stated temperature; the distinction is temperature-dependent rather than a sharp chemical boundary.
- Lipid - A chemical and biological grouping that includes fats, phospholipids and other substances; many oils are lipids, but mineral and silicone oils are not biological lipids.
- Petroleum - A naturally occurring hydrocarbon mixture and a narrower referent of the word oil; the requested sense also includes nonpetroleum materials.
- Grease - Lubricating grease is a semisolid material typically containing a thickener dispersed in a liquid lubricant.
- Emulsion - An emulsion disperses droplets of one liquid in another; an oil-water emulsion does not establish molecular miscibility.
- Which of these neighbouring kinds and how to tell them apart hold for the sense of oil this model covers, and on what evidence? provenance
What the second pass must settle
- How should the registry boundary distinguish oils from fats and waxes that also become slippery, water-immiscible liquids when heated?
- Should essential oils and every synthetic fluid commercially called an oil be included, and what evidence resolves borderline cases?
- Which authoritative specifications and test methods should anchor each oil family's viscosity, water interaction, thermal behaviour and condition assessment?
- How should identifiers represent variable-composition oils and proprietary blends without implying a single pure substance?
- Which application-specific acceptance criteria and jurisdiction-specific requirements must be researched before this model can support operational decisions?