chloroxuron
Enable an agent to identify chloroxuron, assess the condition and evidence quality of a sample, and determine which handling, analytical or use decisions are justified.
Bundle → Layer → Finding → Questions Filled
5 bundles · 9 layers · 15 findings · 23 questions
Chloroxuron identity and sample Establishes which molecular substance and which physical sample an agent is evaluating.
Molecular recognition
Resolves the chlorophenoxy-substituted dimethylurea identity and its external records.
Structure and identifier agreement
Chloroxuron identification requires agreement between its molecular structure and identifier records; NIST records CAS 1982-47-4 and formula C15H15ClN2O2. Reference: [NIST Chemistry WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=1982-47-4).
- Does the candidate structure encode 3-[4-(4-chlorophenoxy)phenyl]-1,1-dimethylurea with the correct substitution positions? definition
- Which read source verifies each CAS, PubChem and EC cross-reference, and do any records disagree? provenance
Sample composition
Separates the substance from technical material, analytical standards and formulated mixtures.
Parent content and grade
A sample must carry its chloroxuron assay, grade and known additional constituents before an agent treats its total mass as active substance.
- What chloroxuron mass fraction was measured, by which method, and on an as-received or dry basis? measurement
- Is this neat chloroxuron, technical material, a reference solution or a formulated product requiring a linked product model? boundary
Chloroxuron properties and analysis Captures condition-specific physical behaviour and evidence that analytical results identify the parent compound.
Physical and thermal behaviour
Records phase, solubility and thermal observations without inserting unsupported constants.
Conditioned property evidence
The model requires sourced property values and distinguishes measurements from estimates and decomposition events.
- What phase, melting range and boiling or decomposition behaviour are documented for chloroxuron at specified purity and pressure? measurement
- What measured solubility in water and the intended preparation solvent applies at the proposed temperature and pH? measurement
Analytical confirmation
Connects detection and quantification to reference material and matrix-specific validation.
Selective parent quantification
A chloroxuron result must identify the parent selectively and disclose recovery, reporting limits and relevant interferences.
- Which reference standard and chromatographic or spectral criteria establish chloroxuron identity separately from related compounds? provenance
- Do matrix validation, recovery and quantification limits support the decision being made from this result? action
Chloroxuron biological and environmental behaviour Relates the parent substance to herbicidal effects, environmental distribution and transformation.
Herbicidal effect evidence
Separates verified biological observations from assumptions based on chemical class.
Mechanism and response
Record chloroxuron-specific mechanism and response evidence with organism, exposure and endpoint; do not inherit quantitative effects from another phenylurea.
- Which authoritative evidence establishes chloroxuron's biochemical target and applicable herbicide mode-of-action classification? provenance
- For which species, growth stage, exposure route and dose was the reported herbicidal or non-target effect measured? measurement
Parent fate and residues
Tracks chloroxuron persistence and movement while keeping transformation products distinct.
Condition-specific fate
Environmental interpretation requires medium-specific degradation and sorption evidence and a clear boundary around what a residue result includes.
- Which measured degradation half-lives and sorption coefficients apply to the relevant soil, water or sediment conditions? measurement
- Does the reported residue quantify intact chloroxuron alone or include specified transformation products under a residue definition? boundary
Chloroxuron hazards and permitted actions Connects sample-specific hazards and dated legal evidence to handling and use decisions.
Hazard and stability evidence
Maintains traceable classification, exposure and compatibility evidence for the material under consideration.
Applicable hazard controls
Handling decisions must use evidence applicable to chloroxuron's actual composition and condition, with unresolved hazard or stability questions recorded explicitly.
- Which current classification and safety data sheet apply to this chloroxuron sample, and which statements arise from other formulation ingredients? boundary
- What documented exposure limits, incompatibilities and storage conditions constrain the proposed handling activity? action
Jurisdiction and activity
Distinguishes active-substance status from permissions for products and particular activities.
Dated permission evidence
Any conclusion about chloroxuron use must name the jurisdiction, activity, effective date and authoritative record.
- Which current official record establishes chloroxuron's status for the proposed jurisdiction and activity? provenance
- Does the activity require a separate product authorisation, research permission, import condition or waste-management 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 chloroxuron 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 chloroxuron 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 chloroxuron 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 chloroxuron 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 chloroxuron 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 chloroxuron 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 chloroxuron 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
Chloroxuron is a synthetic phenylurea herbicide that inhibits photosystem II electron transport in susceptible plants.
In scope
- Molecular identity and verified chemical identifier cross-references
- Purity, grade, impurities and condition of chloroxuron samples
- Physical properties with measurement conditions and evidence
- Herbicidal activity and evidence connecting exposure to biological effects
- Environmental residues, transformation and persistence
- Substance hazard classifications and dated regulatory constraints
Out of scope
- Commercial herbicide formulations and their complete ingredient compositions
- Manufacturing processes and production equipment
- Crop management programmes and field application operations
- Separate models of transformation products and related herbicides
- Clinical diagnosis and treatment of pesticide exposure
- Environmental sites and sampling programmes as independent entities
Why it exists Filled
Enable an agent to identify chloroxuron, assess the condition and evidence quality of a sample, and determine which handling, analytical or use decisions are justified.
Distinguishing features Filled
- Match molecular connectivity to 3-[4-(4-chlorophenoxy)phenyl]-1,1-dimethylurea, including its two aromatic rings joined through oxygen; a similar pesticide name is insufficient. Identity reference: [NIST Chemistry WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=1982-47-4).
- Require consistency between CAS 1982-47-4, formula C15H15ClN2O2 and the structure record; formula alone cannot establish identity. Reference: [NIST Chemistry WebBook](https://webbook.nist.gov/cgi/cbook.cgi?ID=1982-47-4).
- Distinguish chloroxuron from similarly named chlorotoluron, chloroxynil and chlorsulfuron through verified structures and identifiers rather than herbicide function.
- Separate the parent substance from impurities and transformation products using validated analytical evidence; detecting a related residue does not establish intact chloroxuron.
- Distinguish chloroxuron content from the mass of a product or solution containing it; a trade name or formulation label does not establish sample purity.
What robots and AI may and may not do Filled
Must not
- Recommend using it where it is not registered or against its label.
- Advise spraying near water bodies, crops of others or people against label restrictions.
- Dispose of herbicide residues into drains or waters.
- Present it as harmless to aquatic life.
Only with a human decision
- Any decision to apply herbicides on land the agent manages.
May
- Explain chloroxuron as a phenylurea herbicide and its registration status, from official sources.
- Report hazards and label instructions from registered product labels where it is still authorized.
Moral aspects Filled
- Herbicide drift and runoff harm neighbours, water and non-target plants.
- Farm workers bear most of the exposure.
Who is affected
- Farm workers
- Aquatic ecosystems
- Neighbouring growers and residents
Owners Filled
Steward
The registered holder and the user; pesticide regulators control registration and use.
Master systems
- National pesticide registers
Links to other meta-models Filled
parent
- Q11173 - registry parent class
What else AI and robots need to interact with it Filled
Identity and identifiers required Filled
- Vercy registry: vr.tr.chloroxuron
- Wikidata: Q2964148 (https://www.wikidata.org/wiki/Q2964148)
Direct properties required Filled
- Chemical identity: CAS 1982-47-4; formula C15H15ClN2O2; structure-linked identifiers
- Registry cross-references: Verified PubChem CID, EC number and source record with retrieval date
- Purity and grade: Mass fraction %, assay method, uncertainty and grade designation
- Impurity and transformation profile: Named component concentrations in mg/kg or mass %, including reporting limits
- Physical state: Observed phase and appearance at stated temperature and pressure
- Thermal behaviour: Melting range and boiling or decomposition observations in °C, with pressure and method
- Solubility and partitioning: Solubility in mg/L by solvent, temperature and pH; dimensionless log Kow
- Herbicidal function: Herbicide; independently sourced mechanism and biological endpoint records
- Environmental persistence and mobility: DT50 in days; Koc in mL/g; medium, conditions and study method
- Hazard and exposure constraints: Sourced GHS categories and statements; exposure limits in mg/m³ or ppm with averaging period, jurisdiction and date
- Regulatory standing: Authorised, restricted, withdrawn, prohibited or unverified, by jurisdiction, activity and effective date
Recognition required Filled
- Identified by container label, chemical name and identifier, and certificate of analysis rather than by appearance alone.
Capabilities and actions required Filled
- Reconcile a candidate chloroxuron record against verified identifiers and molecular structure.
- Assess whether a sample's certificate, assay and impurity profile support its proposed analytical use.
- Select an evidence-supported analytical method and interpret chloroxuron results within its validation limits.
- Assess storage or handling proposals against sample condition and an applicable safety data sheet.
- Compare residue observations with condition-matched environmental fate evidence.
- Check whether a proposed activity has adequate current regulatory evidence and identify missing authorisations.
Hazards and failure modes required Filled
- Toxicity to aquatic organisms.
- Damage to non-target plants from drift.
- Worker exposure during mixing and spraying.
Standards and interfaces required Filled
- Globally Harmonized System of Classification and Labelling of Chemicals (GHS), United Nations.
Context of use required Filled
- Chloroxuron is encountered in historical agricultural records concerning selective weed control.
- It is also relevant to pesticide residue analysis, environmental monitoring and research on herbicide effects, where historical use does not establish present authorization.
Sources Filled
- Wikidata item Q2964148: chloroxuron - identity and sense of the item
- Wikipedia: Chloroxuron - general description of the item
Open questions
- Which authoritative records verify the PubChem CID and EC number and resolve any ambiguous commercial aliases?
- What measured melting range, boiling or decomposition behaviour, solubility and partition coefficients are reliable, and under which conditions?
- Which chloroxuron-specific studies establish mode of action, selectivity, environmental half-lives and principal transformation products?
- What current GHS classifications, occupational exposure limits and storage incompatibilities apply, and do any nitrosamine-formation concerns require condition-specific controls?
- What is chloroxuron's current legal status in the intended jurisdictions for agricultural use, analytical research, import and disposal?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q2964148/spec.json