malaoxon
Enable an agent to recognise malaoxon, assess the identity and condition of material containing it, and determine whether analytical or handling actions have adequate evidence.
Bundle → Layer → Finding → Questions Filled
6 bundles · 11 layers · 16 findings · 29 questions
Malaoxon identity Establish which molecular entity the malaoxon record represents.
Structure and identifiers
Connect registry identity to molecular connectivity and authoritative identifier records.
Identity concordance
Require identifiers and structural evidence to refer to the same malaoxon entity.
- Which authoritative records connect the sample's name and CAS number to malaoxon's molecular structure? provenance
- Does the structure retain the malathion-derived skeleton while specifying the oxon phosphorus group? definition
Stereochemistry and boundaries
Separate the registered substance from stereochemical specifications and materials containing it.
Entity versus material
Keep one malaoxon substance identity while recording the actual stereochemical and mixture scope of each material.
- Is stereochemistry unspecified, measured as racemic, or supported as a specified or enriched enantiomer? measurement
- Does the referenced record describe malaoxon itself, a reference solution, or a product containing malaoxon? boundary
Malaoxon material quality Describe the composition and physical condition of the material being evaluated.
Purity and related substances
Account for malaoxon content, residual malathion, and other detected constituents.
Composition basis
Separate independently measured malaoxon content from nominal purity or nonspecific detector response.
- What malaoxon mass fraction or solution concentration was established, by which method and with what uncertainty? measurement
- Which related substances, solvents, or unidentified components could bias the stated purity or intended use? boundary
Phase and property evidence
Attach physical-property values to the material form and experimental conditions they describe.
Conditioned physical properties
Distinguish properties of malaoxon from those of a carrier solvent or mixture.
- Which phase, thermal-transition, solubility, and vapour-pressure measurements are supported for characterised malaoxon? measurement
- For each value, what temperature, pressure, purity, and measured or estimated status were reported? provenance
Malaoxon formation and stability Track malaoxon as a transformation product and as material whose concentration can change.
Malathion transformation
Represent evidence linking malathion and malaoxon in a specified system.
Formation attribution
Require system-specific evidence before attributing measured malaoxon to transformation of malathion.
- What observations establish malaoxon formation from malathion in this biological, environmental, or stored-material context? provenance
- Can the evidence distinguish pre-existing malaoxon from malaoxon formed during collection, storage, or analysis? boundary
Persistence and sample integrity
Evaluate whether malaoxon remains representative over the relevant time interval.
Condition-specific stability
Tie changes in malaoxon concentration to recorded conditions and identified products where available.
- What recovery or degradation data apply to the actual matrix, pH, temperature, illumination, and storage duration? measurement
- Do stability data support using the material now, or is reanalysis required before its concentration can be relied upon? action
- Which products or unresolved mass-balance gaps prevent interpreting malaoxon loss as reduced hazard? boundary
Malaoxon analytical evidence Establish whether malaoxon is identified and quantified reliably in the relevant matrix.
Selective identification
Demand evidence that distinguishes malaoxon from competing analytical explanations.
Malaoxon signal confirmation
Connect the reported signal to a characterised reference material and method-specific identity criteria.
- Which chromatographic and spectrometric criteria confirm malaoxon against the reference material? measurement
- How were interference from malathion, related substances, and analytical formation or loss of malaoxon evaluated? boundary
Quantification and reporting
Record the calibration and matrix validation behind a numerical result.
Defensible malaoxon concentration
Require uncertainty, recovery, and reporting limits to accompany concentration claims.
- What calibration traceability, matrix recovery, precision, and quantification limit support this result? measurement
- Is the result a measured concentration, a qualified estimate, or a nondetection at a stated limit? definition
- Does the method's validated matrix and concentration range cover the decision being made? action
Malaoxon hazard and action Connect malaoxon-specific biological evidence and applicable requirements to material-use decisions.
Cholinesterase effect evidence
Preserve the experimental scope of claims about malaoxon's biological activity.
Endpoint and exposure context
Keep enzyme inhibition results separate from organism-level toxicity and exposure conclusions.
- Which enzyme source, species, exposure route, duration, and endpoint support each malaoxon effect value? provenance
- If potency is compared with malathion, were the endpoints and experimental conditions sufficiently comparable? boundary
Classification and permitted handling
Resolve the requirements applicable to the actual malaoxon material and proposed action.
Applicable malaoxon controls
Record verified hazard classifications and action constraints without treating missing limits as evidence of safety.
- Which current jurisdictional records and material-specific safety documentation establish the applicable hazard classification and handling requirements? provenance
- Is an exposure limit explicitly applicable to malaoxon, or has a value for malathion or a broader category been substituted? boundary
- What documented controls and waste acceptance criteria must be satisfied before handling, transferring, or disposing of this material? 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 malaoxon 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 malaoxon 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 malaoxon 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 malaoxon 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 malaoxon 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 malaoxon 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
- Other names and narrower kinds
- (R)-malaoxon, (S)-malaoxon
What it is Filled
Malaoxon is the organophosphorus oxon analogue of malathion, formed by replacing its phosphorus-bound thione sulfur with oxygen, and is a potent acetylcholinesterase inhibitor.
In scope
- Malaoxon identity and distinction from malathion and related transformation products
- Purity, stereochemical specification, impurities, and concentration in identified matrices
- Physical properties and stability under recorded conditions
- Evidence of malaoxon formation, persistence, and disappearance
- Analytical identification and quantification
- Malaoxon-specific toxicological evidence and jurisdiction-dependent handling constraints
Out of scope
- Malathion's complete substance model and pesticide application practices
- Commercial formulations, packaging, and product authorisations beyond their relation to malaoxon
- Complete models of environmental compartments or exposed organisms
- Clinical diagnosis and treatment of organophosphate poisoning
- Laboratory instrument design and general laboratory management
- Manufacturing process design or optimisation
Why it exists Filled
Enable an agent to recognise malaoxon, assess the identity and condition of material containing it, and determine whether analytical or handling actions have adequate evidence.
Distinguishing features Filled
- Match the chemical structure and identifiers together: formula C10H19O7PS, CAS 1634-78-2, and PubChem CID 15415. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Malaoxon)
- Require the malathion-oxon connectivity, including P=O and the retained sulfur linkage to the succinate skeleton; an oxon label alone does not identify malaoxon. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/Malaoxon)
- Distinguish the substance from a solution, environmental residue, or malathion formulation by recording its concentration and the identity of the surrounding matrix.
- Treat acetylcholinesterase inhibition as mechanistic evidence rather than a unique identification test: EPA identifies malaoxon as the active AChE-inhibiting form of malathion. [EPA](https://www.epa.gov/pesticides/epa-releases-updated-draft-risk-assessment-pesticide-malathion)
- Do not equate an unspecified stereochemical identity with a demonstrated racemate or a specified enantiomer; require evidence for the sample's stereochemical designation.
What robots and AI may and may not do Filled
Must not
- Provide guidance on producing, concentrating or using malaoxon to harm people or animals.
- Advise handling it outside a properly equipped and authorized laboratory.
- Downplay exposure symptoms or delay emergency help for a suspected poisoning.
- Recommend storing malathion products in conditions that favour its formation.
Only with a human decision
- Responding to a suspected poisoning, which needs emergency medical services.
- Disposal of contaminated material.
May
- Identify malaoxon in residue or monitoring reports and explain its link to malathion.
- Explain its toxicity and protective rules in general terms from official sources.
Moral aspects Filled
- Malaoxon forms from a widely used insecticide, so it can reach people through food and spray.
- Its toxicity to the nervous system makes accurate safety information essential.
Who is affected
- Farm workers
- Consumers
- Wildlife
Owners Filled
Steward
The laboratory or facility holding a sample; pesticide authorities regulate malathion use.
Master systems
- Pesticide residue monitoring databases
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.malaoxon
- Wikidata: Q3270235 (https://www.wikidata.org/wiki/Q3270235)
Direct properties required Filled
- Chemical identity: Structure-linked identifiers; CAS 1634-78-2; PubChem CID 15415
- Stereochemical specification: Unspecified, racemic, enantiomer-enriched, or specified configuration with supporting evidence
- Malaoxon purity: Mass fraction or mass percent, with analytical method and uncertainty
- Matrix concentration: mg/L, µg/L, mg/kg, or mol/L; record matrix and wet, dry, or other reporting basis
- Related-substance profile: Individually identified malathion and other impurities or transformation products, with concentrations and detection limits
- Physical state and thermal behaviour: Observed phase at temperature and pressure; melting, boiling, or decomposition observations in °C with pressure where applicable
- Partitioning and transport properties: Solubility in mg/L, vapour pressure in Pa, and dimensionless log Kow, with conditions and measured or estimated status
- Stability under specified conditions: Recovery in percent, rate constant with units, or half-life in hours or days; include matrix, pH, temperature, light, and elapsed time
- Acetylcholinesterase inhibition evidence: Percent inhibition, IC50 with concentration units, or kinetic parameter with units; include enzyme source and assay duration
- Applicable regulatory identity and restrictions: Verified registry records, jurisdiction, effective date, substance or mixture scope, hazard classifications, and any applicable exposure limits
Recognition required Filled
- Not identifiable by sight; it is detected by laboratory analysis of residues or samples.
- Reference standards are supplied in labelled vials with toxicity warnings.
Capabilities and actions required Filled
- Reconcile malaoxon names and identifiers against a structure-backed substance record.
- Assess whether a reference material or sample is adequately characterised for a proposed analysis.
- Quantify malaoxon separately from malathion using a method validated for the relevant matrix.
- Compare repeated measurements to flag changes in malaoxon content during storage or sample processing.
- Trace documented formation or loss of malaoxon without assuming that disappearance means detoxification.
- Check whether proposed handling, transfer, or disposal is supported by current substance- and mixture-specific requirements.
Hazards and failure modes required Filled
- Highly toxic to the nervous system by ingestion, inhalation or skin contact.
- Forms from malathion during storage or in the environment, raising residue toxicity.
Standards and interfaces required Filled
- The Globally Harmonized System of Classification and Labelling of Chemicals, published by the United Nations, provides the framework for chemical hazard classification and communication where implemented.
- The Classification, Labelling and Packaging Regulation, adopted by the European Parliament and the Council of the European Union, applies to malaoxon supplied within its scope in the European Union.
Context of use required Filled
- Malaoxon is encountered in studies of malathion transformation, metabolism and toxicity.
- Analytical laboratories investigate it in relevant biological, environmental or pesticide-related samples because its presence can affect toxicity assessments.
Sources Filled
- Wikidata item Q3270235: malaoxon - identity and sense of the item
- Wikipedia: Malaoxon - general description of the item
Open questions
- Which primary measurements establish malaoxon's melting or freezing behaviour, boiling or decomposition behaviour, solubility, and vapour pressure with adequate purity and condition metadata?
- Which current authoritative records verify its EC identity, jurisdiction-specific GHS classifications, and any malaoxon-specific occupational exposure limits?
- How do stereochemical composition and related-substance impurities affect analytical response and biological activity in the intended use?
- What validated holding times and preservation conditions prevent consequential malaoxon formation or loss in the target matrices?
- Which transformation products and biological endpoints must be measured before a decrease in malaoxon concentration can support a reduced-hazard conclusion?
Machine files
Provenance
thing registry research (pass 2) · unreviewed
Built from: models/things/publications/thing-q3270235/spec.json