{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.metolachlor","code":"thing-q409598","url":"https://ver.cy/models/thing/q409598/","name":"metolachlor","alternateNames":["R-metolachlor","S-metolachlor"],"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":"Metolachlor is a synthetic chloroacetanilide herbicide, conventionally supplied as a mixture of stereoisomers, that inhibits very-long-chain fatty-acid synthesis in susceptible plants and is used primarily for residual control of annual grasses and some small-seeded broadleaf weeds.","purpose":"Enable an agent to identify metolachlor, assess the composition and condition of a material or residue, and determine which handling or use decisions have adequate evidence.","scope":{"in":["Metolachlor identity and the boundary between conventional metolachlor and S-enriched material","Technical material, analytical standards, purity and batch-specific impurities","Physical properties tied to temperature, pressure and composition","Parent-substance measurements and links to separately identified transformation products","Evidence supporting herbicidal function, hazards and jurisdiction-specific restrictions"],"out":["Commercial herbicide formulations and their complete co-formulant compositions","Manufacturing processes, production equipment and plant operations","Crop-management programmes and application machinery","Independent substance models for degradation products or neighbouring herbicides","Complete environmental monitoring sites, exposure scenarios or regulatory instruments"],"boundaries":[]},"distinguishingFeatures":["Match molecular connectivity and identifiers: metolachlor has formula C15H22ClNO2, CAS 51218-45-2 and PubChem CID 4169; a trade name alone does not establish identity. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Metolachlor)","Resolve stereochemical composition: conventional metolachlor and S-enriched metolachlor cannot be distinguished by molecular formula alone; metolachlor has four stable stereoisomers associated with a chiral centre and restricted rotation. [EPA stereochemistry assessment](https://www3.epa.gov/pesticides/endanger/litstatus/effects/metolachlor-assessment.pdf)","Check whether a reported quantity refers to metolachlor active ingredient, technical material or the entire formulated product.","Require analyte-specific evidence to distinguish parent metolachlor from transformation products and other chloroacetanilide herbicides."],"structure":{"bundles":[{"id":"identity-and-stereochemistry","name":"Identity and stereochemistry","description":"Establish what material the name metolachlor denotes and how stereochemical enrichment affects that identity.","layers":[{"id":"structural-identity","name":"Structural identity","description":"Reconcile chemical structure, identifiers and registry membership.","findings":[{"id":"identifier-concordance","name":"Identifier concordance","description":"Require agreement between the named substance, molecular connectivity and authoritative identifier records.","questions":[{"text":"Which structure, CAS number, PubChem CID and EC number consistently identify this metolachlor record?","id":"identifier-concordance-q01","kind":"definition"},{"text":"Which source establishes each identifier, and does it describe the substance or a commercial product?","id":"identifier-concordance-q02","kind":"provenance"}]}]},{"id":"stereochemical-boundary","name":"Stereochemical boundary","description":"Represent measured enrichment without creating an unsupported registry split.","findings":[{"id":"isomer-population","name":"Isomer population","description":"Track individual stereoisomers where resolved and distinguish a measured S fraction from an assumed composition.","questions":[{"text":"What stereoisomer fractions are measured, and does the method resolve all four stereoisomers or only grouped fractions?","id":"isomer-population-q01","kind":"measurement"},{"text":"Does the registry place S-metolachlor in a separate entry, and which relationship preserves that authoritative boundary?","id":"isomer-population-q02","kind":"boundary"},{"text":"What evidence supports transferring a property or effect result between conventional and S-enriched material?","id":"isomer-population-q03","kind":"provenance"}]}]}]},{"id":"material-quality-and-state","name":"Material quality and state","description":"Describe the actual metolachlor material behind a certificate, sample or property measurement.","layers":[{"id":"grade-and-composition","name":"Grade and composition","description":"Separate substance assay from product strength and document batch quality.","findings":[{"id":"assay-basis","name":"Assay basis","description":"Tie metolachlor content, water and impurity results to a specific material and reporting basis.","questions":[{"text":"Is this technical metolachlor, a certified standard, an isolated sample or metolachlor within a formulation?","id":"assay-basis-q01","kind":"boundary"},{"text":"What are its metolachlor assay, water content and relevant impurity concentrations, with uncertainty and mass basis?","id":"assay-basis-q02","kind":"measurement"},{"text":"Which batch certificate and analytical methods support acceptance for the intended purpose?","id":"assay-basis-q03","kind":"provenance"}]}]},{"id":"condition-dependent-properties","name":"Condition-dependent properties","description":"Qualify phase and measurable constants by composition and experimental conditions.","findings":[{"id":"physical-property-applicability","name":"Physical-property applicability","description":"Assess whether thermal, density, solubility and volatility values apply to this metolachlor material.","questions":[{"text":"What phase, density, melting/freezing behaviour and boiling behaviour are established at stated temperature and pressure?","id":"physical-property-applicability-q01","kind":"measurement"},{"text":"Which solubility and vapour-pressure measurements identify the tested purity, stereoisomer mixture and experimental conditions?","id":"physical-property-applicability-q02","kind":"provenance"},{"text":"Do observed changes in appearance, phase or assay warrant quarantine or retesting?","id":"physical-property-applicability-q03","kind":"action"}]}]}]},{"id":"analytical-recognition","name":"Analytical recognition","description":"Determine what a laboratory result actually establishes about metolachlor.","layers":[{"id":"analyte-selectivity","name":"Analyte selectivity","description":"Define the substances and stereoisomers included in a reported result.","findings":[{"id":"resolved-measurement-target","name":"Resolved measurement target","description":"Identify whether the method quantifies parent metolachlor, selected stereoisomers or a broader analyte sum.","questions":[{"text":"Does the reported concentration represent total parent metolachlor, resolved stereoisomers or a defined residue sum?","id":"resolved-measurement-target-q01","kind":"definition"},{"text":"How does the method exclude interference from related herbicides, transformation products and matrix components?","id":"resolved-measurement-target-q02","kind":"measurement"}]}]},{"id":"sample-and-result-quality","name":"Sample and result quality","description":"Connect analytical confidence to matrix, preservation and quality-control evidence.","findings":[{"id":"quantification-confidence","name":"Quantification confidence","description":"Preserve information needed to interpret detections, non-detections and comparisons.","questions":[{"text":"What matrix, sampling date, storage conditions and holding-time evidence accompany this metolachlor result?","id":"quantification-confidence-q01","kind":"provenance"},{"text":"What recovery, blank response, uncertainty, LOD and LOQ apply in this matrix?","id":"quantification-confidence-q02","kind":"measurement"},{"text":"Is confirmation or stereoselective analysis required before using this result for identification or comparison?","id":"quantification-confidence-q03","kind":"action"}]}]}]},{"id":"herbicidal-function-and-use-boundary","name":"Herbicidal function and use boundary","description":"Connect metolachlor's biological function to the evidence needed for a particular use.","layers":[{"id":"biological-activity","name":"Biological activity","description":"Qualify herbicidal activity by composition, organism and exposure conditions.","findings":[{"id":"activity-evidence","name":"Activity evidence","description":"Record supported mode-of-action and response evidence without extrapolating beyond the tested material.","questions":[{"text":"Which authoritative evidence establishes metolachlor's mode of action and applicable resistance-group classification?","id":"activity-evidence-q01","kind":"provenance"},{"text":"How do stereochemical composition, target species and growth stage affect the measured response?","id":"activity-evidence-q02","kind":"measurement"}]}]},{"id":"formulation-dependent-use","name":"Formulation-dependent use","description":"Link substance-level evidence to the actual formulation and application context.","findings":[{"id":"use-evidence-transfer","name":"Use evidence transfer","description":"Require the product and application records needed to interpret efficacy and crop-safety claims.","questions":[{"text":"Which formulation, safener or co-active ingredient is involved, and which effects belong to those neighbouring models?","id":"use-evidence-transfer-q01","kind":"boundary"},{"text":"Which current product label and supporting evidence are required to evaluate the proposed crop, timing and active-ingredient rate?","id":"use-evidence-transfer-q02","kind":"action"}]}]}]},{"id":"environmental-fate-and-residues","name":"Environmental fate and residues","description":"Represent movement and transformation of metolachlor in specified environmental media.","layers":[{"id":"transport-and-persistence","name":"Transport and persistence","description":"Qualify mobility and persistence by soil, water and experimental conditions.","findings":[{"id":"conditional-fate","name":"Conditional fate","description":"Assess sorption, dissipation and degradation without treating one study value as a universal constant.","questions":[{"text":"What sorption and mobility measurements apply to the relevant soil organic carbon, texture and water conditions?","id":"conditional-fate-q01","kind":"measurement"},{"text":"Does a reported half-life measure degradation or overall dissipation, and under what temperature, light and oxygen conditions?","id":"conditional-fate-q02","kind":"boundary"}]}]},{"id":"transformation-product-accounting","name":"Transformation-product accounting","description":"Link parent metolachlor to chemically identified products without merging their identities.","findings":[{"id":"parent-product-separation","name":"Parent-product separation","description":"Require explicit identity and formation evidence for products such as metolachlor ESA and OA before interpreting residue patterns.","questions":[{"text":"Which transformation products, including any reported ESA or OA, have verified structures and evidence of formation from metolachlor?","id":"parent-product-separation-q01","kind":"provenance"},{"text":"Are parent and product concentrations reported separately, and what conversion basis supports any combined total?","id":"parent-product-separation-q02","kind":"measurement"},{"text":"Which additional analytes or samples are needed to distinguish transformation from transport or incomplete measurement?","id":"parent-product-separation-q03","kind":"action"}]}]}]},{"id":"hazards-and-regulatory-decisions","name":"Hazards and regulatory decisions","description":"Tie handling and use constraints to the correct metolachlor identity, evidence and jurisdiction.","layers":[{"id":"material-specific-hazards","name":"Material-specific hazards","description":"Identify applicable health and environmental hazard evidence.","findings":[{"id":"hazard-evidence-applicability","name":"Hazard evidence applicability","description":"Distinguish measured endpoints, formal classifications and supplier statements for the assessed material.","questions":[{"text":"Which current GHS classifications and toxicological or ecotoxicological endpoints apply to this identity and grade?","id":"hazard-evidence-applicability-q01","kind":"provenance"},{"text":"Do cited studies test conventional metolachlor, S-enriched material or a formulation, and is transfer justified?","id":"hazard-evidence-applicability-q02","kind":"boundary"},{"text":"Which exposure controls, compatible containment and disposal route follow from the applicable safety record?","id":"hazard-evidence-applicability-q03","kind":"action"}]}]},{"id":"jurisdiction-and-effective-date","name":"Jurisdiction and effective date","description":"Evaluate permissions and limits against current governing records.","findings":[{"id":"applicable-decision-record","name":"Applicable decision record","description":"Keep registration, exposure limits and residue criteria distinct and date-qualified.","questions":[{"text":"Which jurisdiction, effective date and exact substance or product identity govern the proposed possession, supply or use?","id":"applicable-decision-record-q01","kind":"boundary"},{"text":"Which occupational limits, residue limits or water criteria exist, in what units, and are they binding or advisory?","id":"applicable-decision-record-q02","kind":"provenance"},{"text":"Does the available record support the proposed action, or is a current label, authority decision or missing measurement required?","id":"applicable-decision-record-q03","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 metolachlor this model covers, and on what evidence?","id":"evidence-confidence-notes-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 metolachlor 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 metolachlor 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 metolachlor 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 metolachlor 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 metolachlor 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 metolachlor 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 metolachlor this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Identify metolachlor in a product label or residue report and state its approval status in a given jurisdiction.","Report label restrictions such as buffer zones and protective equipment from official sources."],"mustNot":["Recommend uses or rates beyond the product label.","Advise application near water bodies or drinking water sources against label restrictions.","Recommend a product whose approval has been withdrawn in the user's jurisdiction.","Treat the racemic and S-enriched forms as interchangeable in regulatory statements."],"requiresHuman":["Deciding on herbicide application on a farm or site.","Disposal of unused product or contaminated containers."]},"ethics":{"considerations":["Herbicide residues and breakdown products reach groundwater that communities drink.","Weed control decisions affect farm incomes and biodiversity."],"affectedParties":["Farm workers","Communities relying on groundwater","Aquatic life"]},"owners":{"steward":"The farmer or applicator using it; pesticide authorities regulate approval and use.","roles":[],"masterSystems":["Pesticide authorization registers","Water quality monitoring databases"]},"relations":[{"target":"Q11173","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.metolachlor","Wikidata: Q409598 (https://www.wikidata.org/wiki/Q409598)"]},"properties":{"applicability":"required","items":["Chemical identity: Structure; CAS number; PubChem CID; verified EC number; identity source","Stereoisomer composition: Individual stereoisomer fractions and combined S fraction, %; method and uncertainty","Material role and grade: Technical active ingredient; analytical standard; isolated sample; residue in a matrix","Assay and impurity profile: Metolachlor g/kg or mass %; water and identified impurities mg/kg; analytical basis","Physical state and thermal behaviour: Observed phase; temperature °C; pressure kPa; melting/freezing and boiling behaviour with conditions","Partitioning and mobility properties: Water solubility mg/L; vapour pressure Pa; log Kow; Koc L/kg organic carbon; test conditions","Residue concentration: µg/L in water or mg/kg in soil and biological matrices; wet/dry basis; LOD and LOQ","Transformation evidence: Parent-to-product links; tested medium; conditions; half-life in days where supported","Hazard and permission status: Applicable GHS classification; exposure-limit type and units; jurisdiction; effective date; substance or product scope"]},"recognition":{"applicability":"required","items":["Usually seen as a formulated liquid product in labelled containers, so the label settles identity.","The pure substance is a pale yellow to brown oily liquid."]},"capabilities":{"applicability":"required","items":["Reconcile a supplier certificate, analytical standard or residue report with the metolachlor registry identity.","Assess whether a measurement establishes total metolachlor, stereoisomer composition or only an unresolved screening signal.","Compare batches and property measurements after aligning grade, concentration basis and test conditions.","Trace parent-substance measurements to separately identified transformation products.","Identify the formulation, label and jurisdiction evidence needed before a proposed use can be evaluated.","Select handling, containment or further-testing actions supported by the material-specific evidence."]},"hazards":{"applicability":"required","items":["Leaches into groundwater and surface water, with breakdown products detected in drinking water sources.","Toxic to aquatic plants and algae.","Can irritate skin and cause sensitization in handlers."]},"interfaces":{"applicability":"required","items":["Regulation (EC) No 1107/2009 concerning the placing of plant protection products on the market, European Union."]},"context":{"applicability":"required","items":["Metolachlor is encountered in agricultural herbicide formulations used for residual control of annual grasses and some broadleaf weeds.","It is also examined in environmental and residue analysis involving soil, water and agricultural materials.","Analytical and product records distinguish conventional metolachlor mixtures from materials enriched in particular stereoisomers."]}},"sources":[{"title":"Wikidata item Q409598: metolachlor","url":"https://www.wikidata.org/wiki/Q409598","note":"identity and sense of the item"},{"title":"Wikipedia: Metolachlor","url":"https://en.wikipedia.org/wiki/Metolachlor","note":"general description of the item"}],"openQuestions":["Does the registry already contain a separate S-metolachlor entry or an existing world model that governs this boundary?","Which authoritative EC record and stereochemical specifications apply to conventional metolachlor and the actual material under assessment?","Which physical constants are supported by measurements with adequate purity, stereoisomer, temperature and pressure information?","Which current hazard classifications, occupational exposure limits and use permissions apply in the intended jurisdiction?","Which parent and transformation-product methods are sufficiently selective and sensitive for the intended matrix and decision?"],"resources":{"spec":"/models/things/publications/thing-q409598/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q409598/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T11:18:57Z","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 2026-10-07T10:10:30+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}