{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.dopamine","code":"thing-q170304","url":"https://ver.cy/models/thing/q170304/","name":"dopamine","alternateNames":[],"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":"Dopamine is the catecholamine 3,4-dihydroxyphenethylamine, an endogenous signalling molecule that acts as a neurotransmitter and peripheral mediator and is a biosynthetic precursor of noradrenaline and adrenaline.","purpose":"Enable an AI agent to identify dopamine, assess its chemical and biological state, and determine which handling, measurement or use decisions the available evidence supports.","scope":{"in":["Dopamine molecular identity and differentiation from related catecholamines and precursors","Free-base, protonated and salt-form relationships, with form-specific identifiers","Sample composition, purity, concentration and degradation state","Physical properties and stability under explicitly recorded conditions","Dopamine occurrence, biochemical transformations and receptor interactions","Evidence supporting analytical identification, safe handling and permitted use"],"out":["Finished medicines, their formulations, prescribing and patient-specific dosing","Complete models of neurons, synapses, organs or dopaminergic pathways","Diseases, diagnoses and treatment plans associated with dopamine signalling","Reward, pleasure, motivation or addiction as psychological phenomena","Manufacturing processes and analytical instruments as independent things","Related substances such as levodopa, norepinephrine and dopamine-derived polymers"],"boundaries":[]},"distinguishingFeatures":["The neutral parent molecule has a catechol ring bearing a two-carbon chain terminating in a primary amine; its molecular formula is C8H11NO2.","Unlike levodopa, dopamine lacks the amino-acid carboxyl group; precursor and product must remain distinct identities.","Unlike norepinephrine, dopamine lacks a hydroxyl group on the side-chain carbon adjacent to the aromatic ring.","A dopamine salt contains a counterion, so its formula mass and reported mass concentration cannot automatically be treated as those of dopamine free base.","Dopamine identity requires chemical evidence; a sample's biological effect or description as a 'reward chemical' is insufficient."],"structure":{"bundles":[{"id":"dopamine-identity-and-form","name":"Dopamine identity and form","description":"Establishes the dopamine parent structure and the exact form represented by a material record.","layers":[{"id":"parent-structure","name":"Parent structure","description":"Defines structural recognition and exclusion of related compounds.","findings":[{"id":"catechol-ethylamine-identity","name":"Catechol ethylamine identity","description":"Record structural evidence distinguishing dopamine from levodopa, norepinephrine and other similarly named substances.","questions":[{"text":"Which verified structure and identifiers establish that this record denotes dopamine?","id":"catechol-ethylamine-identity-q01","kind":"definition"},{"text":"Which structural or analytical feature excludes levodopa and norepinephrine from this identification?","id":"catechol-ethylamine-identity-q02","kind":"boundary"}]}]},{"id":"salt-and-protonation","name":"Salt and protonation","description":"Separates parent identity from counterions and condition-dependent species.","findings":[{"id":"form-specific-quantity-basis","name":"Form-specific quantity basis","description":"Record the counterion, stoichiometry, hydration and reporting basis needed to interpret a dopamine quantity.","questions":[{"text":"Does the material contain dopamine free base or a specified salt, and what establishes its composition?","id":"form-specific-quantity-basis-q01","kind":"definition"},{"text":"Is the reported mass or concentration expressed as dopamine equivalent or as the complete salt?","id":"form-specific-quantity-basis-q02","kind":"measurement"},{"text":"Which protonation assumptions are justified by the solvent and pH?","id":"form-specific-quantity-basis-q03","kind":"boundary"}]}]}]},{"id":"dopamine-sample-quality","name":"Dopamine sample quality","description":"Captures composition, physical properties and evidence that a sample remains suitable for its intended task.","layers":[{"id":"assay-and-grade","name":"Assay and grade","description":"Records dopamine content and the meaning of supplier or laboratory quality claims.","findings":[{"id":"usable-dopamine-content","name":"Usable dopamine content","description":"Distinguish measured dopamine content from chromatographic area purity, water content and grade labels.","questions":[{"text":"What assay method and calculation basis support the stated dopamine purity?","id":"usable-dopamine-content-q01","kind":"measurement"},{"text":"Which lot-specific certificate or laboratory record establishes impurities, water content and grade?","id":"usable-dopamine-content-q02","kind":"provenance"}]}]},{"id":"physical-properties-and-degradation","name":"Physical properties and degradation","description":"Connects form-specific properties and oxidation evidence to sample history.","findings":[{"id":"condition-dependent-integrity","name":"Condition-dependent integrity","description":"Record solvent, pH, oxygen, light, temperature and time alongside evidence of dopamine integrity or degradation.","questions":[{"text":"Which solubility and thermal-transition measurements apply to this exact form, and do they report decomposition?","id":"condition-dependent-integrity-q01","kind":"measurement"},{"text":"What analytical evidence distinguishes intact dopamine from oxidation products, beyond a change in colour?","id":"condition-dependent-integrity-q02","kind":"measurement"},{"text":"What validated storage or preparation conditions support using this sample for the intended task?","id":"condition-dependent-integrity-q03","kind":"action"}]}]}]},{"id":"dopamine-biological-context","name":"Dopamine biological context","description":"Places dopamine in defined compartments, transformations and molecular interactions.","layers":[{"id":"compartments-and-turnover","name":"Compartments and turnover","description":"Records biological location, origin and production or removal relationships.","findings":[{"id":"localized-dopamine-pool","name":"Localized dopamine pool","description":"Treat each biological dopamine measurement as belonging to a specified compartment and sampling interval.","questions":[{"text":"Which organism, tissue and intracellular or extracellular compartment does the observation represent?","id":"localized-dopamine-pool-q01","kind":"boundary"},{"text":"What evidence links this dopamine pool to precursor conversion, release, uptake or metabolism?","id":"localized-dopamine-pool-q02","kind":"provenance"}]}]},{"id":"receptor-and-transporter-relations","name":"Receptor and transporter relations","description":"Connects dopamine to named molecular targets and bounded experimental outcomes.","findings":[{"id":"contextualized-target-effect","name":"Contextualized target effect","description":"Separate dopamine concentration, target engagement and downstream effect as distinct observations.","questions":[{"text":"Which dopamine receptor subtype or transporter is implicated, and by what evidence?","id":"contextualized-target-effect-q01","kind":"provenance"},{"text":"Under which concentration, exposure duration and experimental conditions was the interaction measured?","id":"contextualized-target-effect-q02","kind":"measurement"},{"text":"Which claimed behavioural or physiological conclusions exceed what this molecular observation establishes?","id":"contextualized-target-effect-q03","kind":"boundary"}]}]}]},{"id":"dopamine-analytical-evidence","name":"Dopamine analytical evidence","description":"Defines what supports identifying and quantifying dopamine in a particular matrix.","layers":[{"id":"identification-selectivity","name":"Identification selectivity","description":"Evaluates whether the analytical method separates dopamine from plausible alternatives.","findings":[{"id":"dopamine-specific-signal","name":"Dopamine-specific signal","description":"Record the reference comparison and selectivity evidence behind an assigned dopamine signal.","questions":[{"text":"Which reference standard and analytical features support assigning the observed signal to dopamine?","id":"dopamine-specific-signal-q01","kind":"provenance"},{"text":"How does the method distinguish dopamine from related catecholamines, oxidation products and matrix interferents?","id":"dopamine-specific-signal-q02","kind":"measurement"}]}]},{"id":"quantification-and-preservation","name":"Quantification and preservation","description":"Captures calibration, recovery and changes between collection and measurement.","findings":[{"id":"defensible-dopamine-concentration","name":"Defensible dopamine concentration","description":"Require a concentration result to carry its matrix, calibration basis, uncertainty and sample-preservation history.","questions":[{"text":"What calibration range, recovery, detection limit and uncertainty apply to this dopamine result?","id":"defensible-dopamine-concentration-q01","kind":"measurement"},{"text":"How were collection, stabilisation and storage validated against dopamine loss or transformation?","id":"defensible-dopamine-concentration-q02","kind":"provenance"},{"text":"Does the result represent free dopamine, a fraction released by sample treatment or another explicitly defined analyte pool?","id":"defensible-dopamine-concentration-q03","kind":"boundary"}]}]}]},{"id":"dopamine-handling-and-use","name":"Dopamine handling and use","description":"Links the exact dopamine material to supported handling practices and use qualifications.","layers":[{"id":"form-specific-hazards","name":"Form-specific hazards","description":"Records applicable safety evidence for the actual solid or solution.","findings":[{"id":"documented-exposure-controls","name":"Documented exposure controls","description":"Tie hazard classifications and handling controls to chemical form, concentration and current documentation.","questions":[{"text":"Which current safety data sheet and jurisdiction-specific classification apply to this dopamine material?","id":"documented-exposure-controls-q01","kind":"provenance"},{"text":"Which controls and disposal instructions follow from its form, solvent, concentration and documented hazards?","id":"documented-exposure-controls-q02","kind":"action"},{"text":"Is a substance-specific exposure limit documented, or is that information unavailable?","id":"documented-exposure-controls-q03","kind":"provenance"}]}]},{"id":"qualified-use-boundaries","name":"Qualified use boundaries","description":"Separates research suitability from pharmaceutical and other regulated use requirements.","findings":[{"id":"lot-to-use-qualification","name":"Lot-to-use qualification","description":"Record evidence connecting this dopamine lot to an intended use while linking product-level decisions to the relevant neighbouring model.","questions":[{"text":"Which lot specifications and quality records establish suitability for the proposed analytical, research or manufacturing use?","id":"lot-to-use-qualification-q01","kind":"action"},{"text":"Which decisions require a linked formulation, medicinal-product or clinical model rather than this dopamine substance model?","id":"lot-to-use-qualification-q02","kind":"boundary"}]}]}]},{"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 dopamine 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 dopamine 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 dopamine this model covers, and on what evidence?","id":"evidence-identifiers-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 dopamine 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 dopamine 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 dopamine this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-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 dopamine this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Explain dopamine's roles in the body and as a medicine from scientific sources.","Correct popular misconceptions about dopamine with evidence."],"mustNot":["Present dopamine detox or dopamine hacking claims as established science.","Advise a person on medicines that act on dopamine in place of their clinician.","Make claims about a person's brain chemistry from their behaviour."],"requiresHuman":["Any change to a patient's dopamine-acting medication."]},"ethics":{"considerations":["Popular myths about dopamine are used to sell products and self-help schemes.","People with Parkinson's disease or psychiatric conditions rely on accurate information."],"affectedParties":["Patients","People seeking self-help","Clinicians"]},"owners":{"steward":"Nobody owns the molecule; medicines regulators license dopamine as a drug.","roles":[],"masterSystems":[]},"relations":[{"target":"Q109189047","type":"parent","note":"registry parent class"},{"target":"Q271663","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.dopamine","Wikidata: Q170304 (https://www.wikidata.org/wiki/Q170304)"]},"properties":{"applicability":"required","items":["Chemical identity and identifier scope: Structure representation; molecular formula; verified CAS, PubChem CID and EC identifiers where applicable, each tied to a specific form","Chemical form: Neutral parent, protonated species or named salt; counterion and hydration state where established","Dopamine content: mol/L, mg/mL or mass fraction, with free-base or salt basis explicitly stated","Purity and impurity profile: Assay percentage with method and basis; identified impurities and their concentrations","Physical state and reference properties: Solid or dissolved state; solvent; temperature in °C; pressure in kPa; solubility in g/L; melting or decomposition observations in °C","Chemical environment: pH, temperature in °C, elapsed time, light exposure and oxygen conditions","Biological location: Organism, tissue, cell and compartment; endogenous or introduced origin","Interaction or transformation: Named receptor, transporter, enzyme, precursor or metabolite, with direction and supporting evidence","Analytical evidence: Method, reference standard, sample preparation, selectivity, detection limits and measurement uncertainty","Hazard and use status: Form-specific safety classification, jurisdiction, source date, grade and documented use restrictions"]},"recognition":{"applicability":"not-applicable","items":[]},"capabilities":{"applicability":"required","items":["Resolve a named material or analytical result to dopamine and its specific chemical form.","Convert reported quantities between salt and dopamine-equivalent bases when composition and assay are established.","Assess whether storage history and analytical evidence support continued sample use.","Select an identification or quantification approach appropriate to the matrix and expected interferents.","Relate dopamine measurements to specified biological compartments and mechanisms.","Determine which handling or use decisions are supported by current form-specific documentation."]},"hazards":{"applicability":"required","items":["As a drug it can cause dangerous heart rhythm and blood pressure changes."]},"interfaces":{"applicability":"required","items":["The Anatomical Therapeutic Chemical classification maintained by the WHO Collaborating Centre for Drug Statistics Methodology assigns medicinal dopamine the code C01CA04."]},"context":{"applicability":"required","items":["Dopamine occurs in nervous tissue and peripheral biological systems, where it participates in chemical signalling.","It is studied in neuroscience, physiology and analytical laboratories to investigate signalling pathways and measure biological samples.","Pharmaceutical preparations are encountered in clinical settings for specific circulatory indications."]}},"sources":[{"title":"Wikidata item Q170304: dopamine","url":"https://www.wikidata.org/wiki/Q170304","note":"identity and sense of the item"},{"title":"Wikipedia: Dopamine","url":"https://en.wikipedia.org/wiki/Dopamine","note":"general description of the item"}],"openQuestions":["Which authoritative records establish CAS, PubChem CID and EC mappings for the dopamine parent and relevant salts without conflating their identities?","Which reliable measurements establish form-specific solubility, melting or decomposition behaviour, and whether a meaningful boiling-point value is available?","What validated stability windows apply across relevant solvents, pH values, oxygen exposure, light conditions and temperatures?","Which current hazard classifications, exposure limits and use restrictions apply to each intended material form and jurisdiction?","Which analytical methods provide adequate dopamine selectivity and preservation for the intended biological or manufactured-material matrices?"],"resources":{"spec":"/models/things/publications/thing-q170304/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q170304/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-07T14:06:59Z","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":"not-applicable","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 2026-10-07T10:10:26+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.recognition":"Dopamine molecules cannot be visually perceived, and the appearance of a bulk material or solution does not establish its chemical identity."},"score":1.0}}