{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.diethyl-tartrate","code":"thing-q886862","url":"https://ver.cy/models/thing/q886862/","name":"diethyl tartrate","alternateNames":["diethyl DL-tartrate","diethyl meso-tartrate"],"kind":"thing","status":"published","version":"0.1.0-research.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.MAT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"Diethyl tartrate is the diethyl ester of tartaric acid, with formula C8H14O6 and structure EtOOC-CH(OH)-CH(OH)-COOEt, occurring as an enantiomeric pair and a meso stereoisomer.","purpose":"Enable an agent to identify diethyl tartrate, assess its stereochemical and material state, and determine its suitability for a specified use.","scope":{"in":["Molecular identity and stereoisomer-qualified identifiers","Enantiomeric composition, meso content, and optical characterization","Lot-specific assay, water content, impurities, and grade","Physical properties with measurement conditions","Storage condition, degradation evidence, and handling constraints","Evidence supporting suitability for a particular chemical or regulated use"],"out":["Tartaric acid, tartrate salts, and other tartrate esters as independent substances","Manufacturing processes and their operating instructions","Complete reaction systems that use diethyl tartrate","Commercial formulations containing diethyl tartrate","Packaging equipment and laboratory apparatus","Jurisdiction-wide chemical regulatory systems"],"boundaries":[]},"distinguishingFeatures":["Verify two ethyl ester groups and two adjacent hydroxyl-bearing carbons; the molecular formula alone cannot establish the required connectivity.","Distinguish the fully esterified substance from tartaric acid, tartrate salts, and monoethyl tartrate.","Distinguish ethyl ester groups from the methyl or isopropyl groups of neighbouring tartrate esters.","Require explicit stereochemical evidence to distinguish an individual enantiomer, a racemate, meso material, and unspecified stereochemistry.","Distinguish neat diethyl tartrate from a solution or formulation by recording the other components and their concentrations."],"structure":{"bundles":[{"id":"chemical-and-registry-identity","name":"Chemical and registry identity","description":"Identify the diethyl ester of tartaric acid without silently resolving the registry's unspecified stereochemistry.","layers":[{"id":"molecular-boundary","name":"Molecular boundary","description":"Establish the connectivity and esterification state required for inclusion.","findings":[{"id":"diethyl-tartrate-connectivity","name":"Diethyl tartrate connectivity","description":"Record the two ethyl ester groups and adjacent hydroxyl-bearing centres as the structural identity test.","questions":[{"text":"What verified structure establishes both ethyl ester groups and the adjacent hydroxyl-bearing carbons?","id":"diethyl-tartrate-connectivity-q01","kind":"definition"},{"text":"Does the material contain diethyl tartrate itself, or primarily tartaric acid, a salt, a partial ester, or another tartrate ester?","id":"diethyl-tartrate-connectivity-q02","kind":"boundary"}]}]},{"id":"identifier-scope","name":"Identifier scope","description":"Map external identifiers to precisely defined chemical entities.","findings":[{"id":"stereospecific-record-mapping","name":"Stereospecific record mapping","description":"An external name match is insufficient: the record titled diethyl tartrate assigns a specific configuration. See [PubChem diethyl tartrate](https://pubchem.ncbi.nlm.nih.gov/compound/Diethyl-tartrate).","questions":[{"text":"Which CAS, PubChem, and EC records have been checked against their structures rather than their names alone?","id":"stereospecific-record-mapping-q01","kind":"provenance"},{"text":"Does the registry intend a stereochemically unspecified concept or the particular isomer represented by its upstream record?","id":"stereospecific-record-mapping-q02","kind":"boundary"}]}]}]},{"id":"stereochemical-fitness","name":"Stereochemical fitness","description":"Capture configuration, stereoisomer composition, and evidence supporting chirality-dependent decisions.","layers":[{"id":"configuration-and-composition","name":"Configuration and composition","description":"Separate absolute configuration from mixture composition and commercial naming.","findings":[{"id":"stereochemical-specification","name":"Stereochemical specification","description":"Require explicit configuration and composition rather than relying on D/L or positive/negative labels alone.","questions":[{"text":"What absolute configuration or stereoisomer mixture is specified for this material?","id":"stereochemical-specification-q01","kind":"definition"},{"text":"What analysis quantifies the opposite enantiomer and meso component, including detection limits?","id":"stereochemical-specification-q02","kind":"measurement"}]}]},{"id":"optical-evidence","name":"Optical evidence","description":"Qualify optical measurements and their relationship to identity and purity.","findings":[{"id":"qualified-optical-rotation","name":"Qualified optical rotation","description":"Treat optical rotation as condition-dependent evidence that requires an appropriate reference and supporting composition data.","questions":[{"text":"What specific rotation was measured, with which solvent, concentration convention, temperature, and wavelength?","id":"qualified-optical-rotation-q01","kind":"measurement"},{"text":"What independent evidence distinguishes a racemate, meso material, or another mixture when rotation is near zero?","id":"qualified-optical-rotation-q02","kind":"boundary"}]}]}]},{"id":"lot-composition-and-grade","name":"Lot composition and grade","description":"Record how much diethyl tartrate is present and which accompanying substances affect use.","layers":[{"id":"assay-and-form","name":"Assay and form","description":"Distinguish neat material, mixtures, and assay reporting conventions.","findings":[{"id":"quantified-diethyl-tartrate-content","name":"Quantified diethyl tartrate content","description":"Attach the assay method, calculation basis, and material form to every content claim.","questions":[{"text":"Is this neat diethyl tartrate or a solution, and what are the identities and quantities of other components?","id":"quantified-diethyl-tartrate-content-q01","kind":"boundary"},{"text":"Does the reported assay represent mass fraction, chromatographic area percentage, or another basis?","id":"quantified-diethyl-tartrate-content-q02","kind":"measurement"}]}]},{"id":"water-and-related-substances","name":"Water and related substances","description":"Characterize moisture and impurities relevant to the intended use.","findings":[{"id":"impurity-acceptance-profile","name":"Impurity acceptance profile","description":"Assess water, residual solvents, free acidity, and related tartrate species as analytes to investigate rather than presumed constituents.","questions":[{"text":"What methods and results establish water content, residual ethanol, free acidity, and any partially hydrolysed species?","id":"impurity-acceptance-profile-q01","kind":"measurement"},{"text":"Which impurity limits define the claimed grade, and which lot-specific certificate demonstrates compliance?","id":"impurity-acceptance-profile-q02","kind":"provenance"}]}]}]},{"id":"physical-state-and-property-evidence","name":"Physical state and property evidence","description":"Represent measured behaviour under explicit conditions and for an identified stereochemical composition.","layers":[{"id":"phase-and-thermal-properties","name":"Phase and thermal properties","description":"Connect phase observations and thermal transitions to sample identity and conditions.","findings":[{"id":"qualified-thermal-record","name":"Qualified thermal record","description":"Store melting, freezing, boiling, and decomposition observations separately, with their experimental context.","questions":[{"text":"What phase and melting or freezing interval are observed for the specified stereochemical composition?","id":"qualified-thermal-record-q01","kind":"measurement"},{"text":"At what pressure was the boiling temperature measured, and was decomposition investigated?","id":"qualified-thermal-record-q02","kind":"measurement"}]}]},{"id":"liquid-properties-and-solvents","name":"Liquid properties and solvents","description":"Support measurement, transfer, and solvent-selection decisions.","findings":[{"id":"conditioned-property-comparison","name":"Conditioned property comparison","description":"Compare density, refractive index, viscosity, and solubility only when sample composition and measurement conditions are compatible.","questions":[{"text":"What density, refractive index, and viscosity measurements are available at the intended handling temperature?","id":"conditioned-property-comparison-q01","kind":"measurement"},{"text":"What measured solubility or miscibility supports use with the intended solvent composition and temperature?","id":"conditioned-property-comparison-q02","kind":"action"}]}]}]},{"id":"stability-and-handling","name":"Stability and handling","description":"Connect exposure history, storage evidence, and safety documentation to the lot's current state.","layers":[{"id":"storage-and-retest","name":"Storage and retest","description":"Track conditions that may change composition or invalidate prior measurements.","findings":[{"id":"continued-material-fitness","name":"Continued material fitness","description":"Use documented storage requirements and analytical trends to assess possible hydrolysis, contamination, or other deterioration.","questions":[{"text":"What temperature, closure, moisture-control, and retest requirements are supported for this grade?","id":"continued-material-fitness-q01","kind":"provenance"},{"text":"Do exposure history or changes in water content, acidity, assay, or appearance require quarantine and retesting?","id":"continued-material-fitness-q02","kind":"action"}]}]},{"id":"material-specific-safety","name":"Material-specific safety","description":"Resolve hazards and handling measures for the identified material and operation.","findings":[{"id":"applicable-hazard-evidence","name":"Applicable hazard evidence","description":"Keep GHS classification, exposure controls, incompatibilities, and disposal guidance tied to applicable documentation rather than inferred from the name.","questions":[{"text":"Which current SDS covers this composition, supplier, and jurisdiction, and what classification and incompatibilities does it document?","id":"applicable-hazard-evidence-q01","kind":"provenance"},{"text":"What exposure-limit evidence and controls apply to the proposed handling operation, including heating or aerosol generation?","id":"applicable-hazard-evidence-q02","kind":"action"}]}]}]},{"id":"application-suitability","name":"Application suitability","description":"Determine whether an identified lot satisfies the chemical and documentary requirements of a named use.","layers":[{"id":"reaction-role-qualification","name":"Reaction role qualification","description":"Link material specifications to the requirements of a referenced reaction or coordination role.","findings":[{"id":"chiral-use-acceptance","name":"Chiral use acceptance","description":"Record the configuration, stereochemical purity, chemical assay, and moisture limits demanded by the proposed use.","questions":[{"text":"Which referenced procedure requires this configuration of diethyl tartrate, and what material acceptance limits does it specify?","id":"chiral-use-acceptance-q01","kind":"provenance"},{"text":"Does this lot meet those limits, and what evidence supports substitution for the originally specified reagent?","id":"chiral-use-acceptance-q02","kind":"action"}]}]},{"id":"regulated-use-qualification","name":"Regulated use qualification","description":"Separate substance identification from permission and grade requirements for a particular market and application.","findings":[{"id":"documented-use-eligibility","name":"Documented use eligibility","description":"Require application-specific evidence before assigning food, flavouring, pharmaceutical, or other regulated suitability.","questions":[{"text":"What authoritative record covers the exact identity, intended use, jurisdiction, and assessment date?","id":"documented-use-eligibility-q01","kind":"provenance"},{"text":"Which grade, impurity, concentration, or documentation requirements remain unmet before this lot can be released for that use?","id":"documented-use-eligibility-q02","kind":"action"}]}]}]},{"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.","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.","questions":[{"text":"Which of these check these first hold for the sense of diethyl tartrate this model covers, and on what evidence?","id":"evidence-confidence-notes-q01","kind":"provenance"}]},{"id":"evidence-kinds","name":"Kinds and varieties","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these kinds and varieties hold for the sense of diethyl tartrate this model covers, and on what evidence?","id":"evidence-kinds-q01","kind":"provenance"}]},{"id":"evidence-identifiers","name":"Identifiers and schemes","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these identifiers and schemes hold for the sense of diethyl tartrate this model covers, and on what evidence?","id":"evidence-identifiers-q01","kind":"provenance"}]},{"id":"evidence-standards-and-regulation","name":"Standards and regulation","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these standards and regulation hold for the sense of diethyl tartrate this model covers, and on what evidence?","id":"evidence-standards-and-regulation-q01","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.","questions":[{"text":"Which of these real-world use hold for the sense of diethyl tartrate this model covers, and on what evidence?","id":"evidence-real-world-use-q01","kind":"provenance"}]},{"id":"evidence-measurements","name":"Typical measurements","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these typical measurements hold for the sense of diethyl tartrate this model covers, and on what evidence?","id":"evidence-measurements-q01","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.","questions":[{"text":"Which of these failure modes and hazards hold for the sense of diethyl tartrate this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-regional-variation","name":"Regional variation","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these regional variation hold for the sense of diethyl tartrate this model covers, and on what evidence?","id":"evidence-regional-variation-q01","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.","questions":[{"text":"Which of these neighbouring kinds and how to tell them apart hold for the sense of diethyl tartrate this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Identify diethyl tartrate and its stereoisomer from name, structure and identifiers.","Report safety data from the supplier's safety data sheet."],"mustNot":["Treat the enantiomers and meso form as interchangeable.","Recommend use in food, cosmetics or medicine without the appropriate grade and approval.","Present supplier specifications as batch measurements."],"requiresHuman":["Approving a material lot for use in synthesis that leads to medicines."]},"ethics":{"considerations":["Stereochemical errors in synthesis can produce wrong or harmful products.","Accurate labelling protects laboratory workers."],"affectedParties":["Laboratory workers","Researchers","Downstream product users"]},"owners":{"steward":"The laboratory or person holding the material; the supplier answers for its stated purity.","roles":[],"masterSystems":["Chemical substance databases"]},"relations":[{"target":"Q56702513","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.diethyl-tartrate","Wikidata: Q886862 (https://www.wikidata.org/wiki/Q886862)"]},"properties":{"applicability":"required","items":["Molecular identity: C8H14O6; structure representation with explicit or explicitly unspecified stereochemistry","Stereochemical specification: (2R,3R), (2S,3S), meso, racemate, characterized mixture, or unspecified","Identifier mapping: CAS number, PubChem CID, EC number, and structure identifiers, each linked to its exact stereochemical scope and source","Chemical assay: % mass fraction or explicitly identified analytical response basis; method and uncertainty","Stereoisomer composition: % of each quantified stereoisomer; enantiomeric excess with named major enantiomer","Specific optical rotation: Reported specific-rotation convention, temperature, wavelength, solvent, concentration, and method","Water and residual impurities: Water in mg/kg or % mass; individual impurities in mg/kg or % with detection limits","Phase and thermal behaviour: Observed phase at temperature and pressure; melting/freezing interval in °C; boiling temperature in °C at stated pressure","Density and refractive index: Density in g/mL at stated temperature; dimensionless refractive index at stated temperature and wavelength","Solvent compatibility: Solubility in g/L or explicitly defined miscibility observation, with solvent composition and temperature","Storage and release status: Unopened, opened, within retest period, retest required, quarantined, or released for a named use","Safety and regulatory evidence: Applicable SDS, GHS determination, exposure-limit evidence, and use-specific regulatory record with jurisdiction and revision date"]},"recognition":{"applicability":"required","items":["A colourless, viscous liquid supplied in labelled bottles.","The stereoisomer is identified by the label and by optical rotation, not by appearance."]},"capabilities":{"applicability":"required","items":["Match a labelled material to a verified structure and stereochemical specification.","Compare candidate lots against chemical purity, stereochemical purity, and water-content requirements.","Calculate usable diethyl tartrate quantity from a measured amount and a qualified assay.","Evaluate whether a lot meets the requirements of a specified chiral reagent or ligand role.","Select documented storage and handling conditions and trigger retesting when evidence is insufficient.","Accept, quarantine, or reject material for a named application using traceable criteria."]},"hazards":{"applicability":"required","items":["Wrong stereoisomer use can spoil a stereoselective synthesis.","Can irritate eyes and skin."]},"interfaces":{"applicability":"required","items":["Regulation (EC) No 1907/2006 on chemical registration, evaluation, authorisation and restriction, issued by the European Parliament and Council, applies to manufacture, import and supply in the European Union subject to its scope and exemptions.","Regulation (EC) No 1272/2008 on classification, labelling and packaging, issued by the European Parliament and Council, governs hazard assessment and applicable supply labelling in the European Union."]},"context":{"applicability":"required","items":["Diethyl tartrate is encountered in chemical research and synthesis as an ester of tartaric acid with multiple stereochemical forms.","Its enantiomeric forms are used as chiral ligands or intermediates where stereochemistry influences the desired reaction outcome.","Material selection requires identifying the stereoisomer, purity and composition specified for the intended use."]}},"sources":[{"title":"Wikidata item Q886862: diethyl tartrate","url":"https://www.wikidata.org/wiki/Q886862","note":"identity and sense of the item"},{"title":"Wikipedia: Diethyl tartrate","url":"https://en.wikipedia.org/wiki/Diethyl_tartrate","note":"general description of the item"}],"openQuestions":["Does vr.tr.diethyl-tartrate denote stereochemically unspecified diethyl tartrate or a particular stereoisomer inherited from its upstream registry source?","Which CAS numbers, PubChem CIDs, and EC numbers correctly map to the registry concept and its stereochemical variants without splitting the registered entry?","Which measured thermal, density, refractive-index, and solubility values are reliable for each relevant stereochemical composition and grade?","What validated methods and acceptance limits distinguish adequate chemical purity, stereochemical purity, and water content for the intended applications?","What current safety, exposure-limit, storage-stability, and regulated-use evidence applies to the exact material and target jurisdiction?"],"resources":{"spec":"/models/things/publications/thing-q886862/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q886862/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T09:09:53Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:33+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}