(−)-nicotine
Enable an AI agent to identify (−)-nicotine, assess the identity and condition of material containing it, and determine whether a proposed handling or use is supported by evidence.
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.
Researched by: Codex + Grok
Purpose and description
Enable an AI agent to identify (−)-nicotine, assess the identity and condition of material containing it, and determine whether a proposed handling or use is supported by evidence.
The naturally occurring (S)-enantiomer of nicotine, a pyridine-pyrrolidine alkaloid that is the principal psychoactive constituent of Nicotiana species and a high-affinity agonist of nicotinic acetylcholine receptors.
It can be Resolve a nicotine identity claim against structural and stereochemical evidence.; Request and interpret assays that distinguish total nicotine, S-nicotine and relevant impurities.; Compare nicotine quantities after verifying chemical form and reporting basis.; Link the substance to a salt, formulation or sample without conflating their identities.; Assess whether storage history or analytical changes require retesting or quarantine.; Route proposed handling, transfer or disposal through applicable substance-specific controls..
Distinguishing features
Require evidence for the S-configured nicotine structure, rather than accepting an unspecified nicotine label: PubChem identifies (−)-nicotine with (S)-3-(1-methylpyrrolidin-2-yl)pyridine. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/L-Nicotine)
Use an enantioselective measurement to distinguish S-enriched nicotine from R-nicotine and racemic nicotine; a total-nicotine assay alone does not establish the claimed stereochemical composition.
Check protonation, counterions and composition to distinguish neat free-base material from a nicotine salt or nicotine-containing solution.
Require analytical discrimination from related alkaloids and transformation products; a product name, colour or nominal molecular mass alone is insufficient.
Treat optical rotation as condition-dependent supporting evidence, recording wavelength, temperature, solvent and concentration before comparing results.
Scope
+ Stereochemical identity and discrimination from other nicotine compositions
+ Free-base identity and relations to protonated nicotine, salts and mixtures
+ Nicotine assay, enantiomeric composition and relevant impurities
+ Material condition, storage history and analytical evidence of change
+ Substance-specific handling constraints and suitability for a declared use
- Tobacco plants, cultivation and whole-leaf composition
- Complete formulations and delivery performance of nicotine-containing products
- Patient treatment, dosing, dependence and clinical outcomes
- Detailed synthesis, extraction and purification processes
- Complete models of nicotine salts, metabolites and other alkaloids
- Facility-wide chemical safety and waste-management systems
Characteristics
- Stereospecific identity confidence
- claimed | supported | conflicting | unresolved Determines whether the material can be identified specifically as (−)-nicotine.
- Nicotine enantiomer composition
- S and R mole fractions or percentages, with method and uncertainty Separates stereochemical purity from overall chemical purity.
- Chemical presentation
- free base | protonated species in solution | identified salt | mixed | unresolved Prevents treating every nicotine-bearing material as neat free-base nicotine.
- Counterion or host matrix
- identified counterion, solvent, formulation or biological matrix Provides context for interpreting assay, speciation and handling evidence.
- Nicotine content
- mg, mg/g, mg/mL or mol/L, explicitly stating total nicotine versus S-nicotine and free-base-equivalent versus salt basis Prevents incompatible quantities from being compared or substituted.
- Optical rotation
- observed degrees or specific rotation with convention, wavelength, temperature, solvent and concentration Supports stereochemical assessment only when measurement conditions are interpretable.
- Solution acidity and nicotine speciation
- pH where applicable; estimated or measured species fractions with medium, temperature and method Connects the nicotine moiety to its actual chemical state in the material.
- Impurity and transformation-product profile
- identified substances and concentrations, reporting limits and unresolved analytical signals Supports decisions about contamination, deterioration and fitness for use.
- Storage and exposure history
- dated temperature, light, air, moisture, container and opening records Allows current analytical results to be interpreted against the material's history.
- Disposition for intended use
- unassessed | accepted for specified use | restricted | quarantined | rejected Makes acceptance conditional on a declared use, supporting evidence and applicable requirements.
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 6 bundles · 11 layers · 11 findings · 23 questions.
Nicotine stereochemical identity Establishes whether the evidence identifies the registered S-configured nicotine substance.
The minus sign carries identity information that generic nicotine records can omit.
Molecular identity
Connects the name to an explicitly stereochemical molecular identity.
Structure and identifier agreement
Record whether structural evidence and identifiers consistently designate (−)-nicotine.
- Does the assigned structure explicitly specify S configuration at nicotine's stereogenic centre? definition
- Which authoritative identity record and sample-specific evidence support that assignment? provenance
Enantiomer discrimination
Separates verified stereochemical composition from an unqualified nicotine assay.
S and R composition
Record the measured enantiomer proportions and the limitations of supporting evidence.
- What S and R proportions were measured, by which enantioselective method and with what detection limits? measurement
- If optical rotation supports identification, are its conditions and reference comparison recorded? measurement
- What use-specific acceptance rule distinguishes acceptable S-enriched material from an unresolved or mixed-enantiomer sample? boundary
Nicotine form and matrix Locates the nicotine identity within its actual chemical presentation.
Free base, protonated nicotine and nicotine-bearing mixtures require different interpretations of the same nicotine claim.
Protonation and counterions
Records evidence for the material's nicotine species and salt relationships.
Chemical form assignment
Keep free-base identity distinct from the identity of a complete salt or solution.
- Is nicotine present as free base, protonated species or a mixture, and what establishes this? definition
- Where a salt is claimed, which counterion and stoichiometry are established, and which neighbouring model owns the complete salt? boundary
Matrix-dependent state
Records the medium needed to interpret nicotine's state in a sample.
Medium and speciation evidence
Attach solvent, acidity and temperature context to claims about nicotine species.
- What solvent or host matrix contains the nicotine, and is its composition adequately known? provenance
- Which measured conditions and validated assumptions support any reported unprotonated fraction? measurement
Nicotine assay and composition Determines how much relevant nicotine is present and what accompanies it.
A concentration without stereochemical and chemical-form basis can misrepresent the registered substance.
Quantity basis
Makes nicotine measurements comparable without silently changing their meaning.
Assay meaning and conversion
Record the analyte, denominator and conversion basis of every nicotine quantity.
- Does the reported value quantify total nicotine, S-nicotine, free-base-equivalent nicotine or the mass of a complete salt? measurement
- Are concentration basis, uncertainty and any density or stoichiometry needed for conversion available? measurement
Analytical selectivity
Tests whether the analytical evidence separates nicotine from accompanying substances.
Impurities and assay interference
Record relevant impurities, unresolved signals and limitations of the nicotine assay.
- Which related alkaloids, residual process materials or transformation products were sought and quantified? measurement
- What demonstrates that matrix effects or unresolved compounds do not invalidate the reported nicotine result? provenance
Nicotine condition and history Connects present composition to production, storage and subsequent changes.
Neither an origin claim nor an old certificate establishes the current condition of a nicotine sample.
Origin and lot continuity
Separates material provenance from chemical identity and preserves sample traceability.
Origin claim evidence
Record extraction or synthesis claims without using them as substitutes for stereochemical measurement.
- What evidence supports the claimed nicotine origin and connects the tested sample to the supplied lot? provenance
- Is origin relevant to the intended use, and has it been kept separate from proof of S configuration and purity? boundary
Change during storage
Assesses whether the material remains supported by its existing qualification evidence.
Condition change and retest
Compare exposure history and current measurements with a documented baseline.
- What air, light, moisture, temperature and container exposures occurred after the last qualifying assay? provenance
- Have nicotine assay, impurity profile or physical observations changed relative to the baseline? measurement
- Which evidence-based criterion requires retesting, quarantine or rejection? action
Nicotine handling and use decisions Connects the assessed material to a specific proposed operation and its applicable controls.
Nicotine can be absorbed through skin and presents serious toxicity hazards, making exposure context relevant to handling decisions. [CDC/NIOSH](https://www.cdc.gov/niosh/ershdb/emergencyresponsecard_29750028.html)
Exposure context
Identifies how the proposed operation could expose people to the actual nicotine-bearing material.
Operation-specific controls
Use the material's concentration, form and operation to identify applicable handling requirements.
- What nicotine quantity, concentration, matrix and potential exposure routes are involved in the proposed operation? measurement
- Which current safety data and approved procedure establish the required containment, protective equipment and incident response? action
Use-specific disposition
Makes acceptance or restriction explicit for a named purpose.
Qualification and permitted next step
Record the evidence and authority supporting analysis, use, transfer, continued storage or disposal.
- Which identity, enantiomeric composition, assay and impurity requirements apply to the declared use? boundary
- Do the available results and applicable jurisdictional requirements support the proposed action, or require restriction or further review? 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.
Kinds and varieties
Reported by the breadth pass; each item needs checking against its source before it becomes normative.
- tobacco-leaf alkaloid
- pharmaceutical nicotine (NRT)
- e-liquid / vaping nicotine
- synthetic (S)-nicotine
- nicotine salt
- pesticide-grade nicotine
- Which of these kinds and varieties hold for the sense of (−)-nicotine this model covers, and on what evidence? provenance
What the second pass must settle
- Does the registry intend this entry to own only neutral (S)-nicotine, or also nicotine-moiety records within protonated forms and salts?
- What enantiomeric acceptance thresholds and analytical methods are appropriate for each intended use?
- Which impurity and transformation-product panels are required for the relevant origins, matrices and grades?
- What validated storage, container-compatibility and retest criteria apply to each material presentation?
- Which jurisdiction, product category and operational setting determine the applicable handling, transfer and disposal requirements?