{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.naphthol-green-b","code":"thing-q10859529","url":"https://ver.cy/models/thing/q10859529/","name":"Naphthol Green B","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":"Naphthol Green B is a water-soluble green acid dye consisting of the sodium salt of an iron coordination complex with nitrosonaphthol sulfonate ligands.","purpose":"Enable an agent to identify Naphthol Green B, assess the condition and suitability of a particular lot or preparation, and select evidence-supported handling and use.","scope":{"in":["Chemical identity and reconciliation of Naphthol Green B, Acid Green 1, and Colour Index identifiers","Iron-containing dye composition, sodium counterions, purity, moisture, and lot variation","Powder and dissolved states with preparation and measurement conditions","Absorption spectrum, color strength, and changes during storage or use","Evidence of suitability for a specified staining or analytical method","Substance-specific safety evidence and its applicability to a lot or preparation"],"out":["Manufacturing equipment and complete dye synthesis processes","Commercial product packaging, pricing, and procurement workflows","Complete staining, titration, or textile-processing protocols","The identity and condition of specimens or substrates being treated","Complete formulations containing Naphthol Green B and other ingredients","Waste-treatment infrastructure and jurisdiction-wide chemical regulation"],"boundaries":[]},"distinguishingFeatures":["Reconcile the name against CAS 19381-50-1, EC 243-010-2, and C.I. 10020 rather than accepting a green-dye trade name alone; these identifiers and the synonym Acid Green 1 are listed by the [supplier](https://www.sigmaaldrich.com/US/en/product/sigma/n7257).","Check for the iron-containing, trisodium composition represented by C30H15FeN3Na3O15S3; a free naphthol ligand or another green dye does not establish this identity.","Compare a measured absorption spectrum under documented conditions with an authenticated reference; a supplier lists an absorption maximum of 714 nm, but that value alone is not an identity test.","Separate substance identity from grade: a technical-grade lot does not acquire microscopy or complexometry suitability merely by sharing the same CAS number."],"structure":{"bundles":[{"id":"chemical-identity","name":"Chemical identity","description":"Recognize Naphthol Green B across names and chemical representations.","layers":[{"id":"names-and-identifiers","name":"Names and identifiers","description":"Reconcile registry, chemical, and supplier naming.","findings":[{"id":"identifier-agreement","name":"Identifier agreement","description":"Require agreement between the recorded substance name and independently checked identifiers.","questions":[{"text":"Does the material record identify CAS 19381-50-1 and C.I. 10020 consistently with Naphthol Green B?","id":"identifier-agreement-q01","kind":"definition"},{"text":"Which authoritative record establishes the PubChem CID, and has it been distinguished from a supplier-linked PubChem Substance ID?","id":"identifier-agreement-q02","kind":"provenance"}]}]},{"id":"complex-and-counterions","name":"Complex and counterions","description":"Describe the iron-containing dye entity and the basis of its formula.","findings":[{"id":"composition-boundary","name":"Composition boundary","description":"Distinguish the nominal sodium salt from free ligand, other counterion forms, and formulated mixtures.","questions":[{"text":"What structural evidence establishes the iron coordination, ligand representation, and sodium counterions?","id":"composition-boundary-q01","kind":"definition"},{"text":"Does the sample conform to the nominal formula, or does its water, salt, or additive content require a separate composition description?","id":"composition-boundary-q02","kind":"boundary"}]}]}]},{"id":"lot-composition-and-grade","name":"Lot composition and grade","description":"Determine how much usable dye a specific material contains.","layers":[{"id":"assay-and-residue","name":"Assay and residue","description":"Separate dye content from moisture and non-dye material.","findings":[{"id":"usable-dye-content","name":"Usable dye content","description":"Record assay with its analytical method and reporting basis.","questions":[{"text":"Is the reported value a chemical mass assay, spectrophotometric color strength, or another method-defined quantity?","id":"usable-dye-content-q01","kind":"measurement"},{"text":"What water, insoluble material, or residual salts must be accounted for when weighing this lot?","id":"usable-dye-content-q02","kind":"measurement"}]}]},{"id":"grade-evidence","name":"Grade evidence","description":"Connect grade claims to lot documentation.","findings":[{"id":"lot-qualification-record","name":"Lot qualification record","description":"Treat technical, microscopy, and analytical suitability claims as distinct evidence-bearing attributes.","questions":[{"text":"Which certificate and lot number support the claimed grade and its acceptance limits?","id":"lot-qualification-record-q01","kind":"provenance"},{"text":"Which additional checks are required before substituting this lot for the grade specified by the intended method?","id":"lot-qualification-record-q02","kind":"action"}]}]}]},{"id":"dissolution-and-material-state","name":"Dissolution and material state","description":"Assess powder condition and the behavior of dye preparations.","layers":[{"id":"powder-condition","name":"Powder condition","description":"Assess the starting material before preparation.","findings":[{"id":"as-received-condition","name":"As-received condition","description":"Record moisture evidence, caking, and visible contamination without assuming their cause.","questions":[{"text":"What changes in powder appearance or handling distinguish this sample from the lot's accepted reference condition?","id":"as-received-condition-q01","kind":"measurement"},{"text":"Does suspected moisture uptake require reassay or a concentration correction before preparation?","id":"as-received-condition-q02","kind":"action"}]}]},{"id":"solution-preparation","name":"Solution preparation","description":"Record solvent-dependent dissolution and preparation conditions.","findings":[{"id":"dissolved-fraction","name":"Dissolved fraction","description":"Distinguish complete dissolution from suspended or precipitated dye-containing material.","questions":[{"text":"At the intended concentration, solvent composition, pH, and temperature, does the preparation dissolve completely?","id":"dissolved-fraction-q01","kind":"measurement"},{"text":"If filtration removes solids, what evidence establishes the remaining dye concentration?","id":"dissolved-fraction-q02","kind":"measurement"},{"text":"What validated preparation conditions avoid unacceptable precipitation during the intended use interval?","id":"dissolved-fraction-q03","kind":"action"}]}]}]},{"id":"optical-response-and-stability","name":"Optical response and stability","description":"Characterize the dye's measured spectrum and changes over time.","layers":[{"id":"spectral-fingerprint","name":"Spectral fingerprint","description":"Evaluate spectral agreement under controlled conditions.","findings":[{"id":"reference-spectrum-agreement","name":"Reference spectrum agreement","description":"Use peak position together with spectral shape and normalized intensity.","questions":[{"text":"How do peak wavelength and spectral shape compare with an authenticated Naphthol Green B reference in the same solvent?","id":"reference-spectrum-agreement-q01","kind":"measurement"},{"text":"Were path length, blank, concentration, pH, and temperature recorded sufficiently to interpret the comparison?","id":"reference-spectrum-agreement-q02","kind":"provenance"}]}]},{"id":"response-over-time","name":"Response over time","description":"Track optical performance during storage and exposure.","findings":[{"id":"color-retention","name":"Color retention","description":"Investigate changes without equating every absorbance loss with chemical decomposition.","questions":[{"text":"How does the spectrum change with preparation age, light exposure, temperature, and the intended chemical environment?","id":"color-retention-q01","kind":"measurement"},{"text":"What evidence distinguishes chemical change from precipitation, dilution, or adsorption to the container?","id":"color-retention-q02","kind":"boundary"},{"text":"Which measured change triggers requalification or disposal of the preparation?","id":"color-retention-q03","kind":"action"}]}]}]},{"id":"method-specific-performance","name":"Method-specific performance","description":"Connect material properties to a defined staining or analytical task.","layers":[{"id":"staining-performance","name":"Staining performance","description":"Assess compatibility with a named staining procedure.","findings":[{"id":"stain-acceptance","name":"Stain acceptance","description":"Link lot acceptance to target coloration, background, and controls.","questions":[{"text":"Which documented staining procedure specifies Naphthol Green B, and what target and background outcomes define acceptance?","id":"stain-acceptance-q01","kind":"provenance"},{"text":"Does this lot reproduce the required result on appropriate controls at the specified concentration?","id":"stain-acceptance-q02","kind":"measurement"}]}]},{"id":"complexometric-performance","name":"Complexometric performance","description":"Evaluate suitability for the particular analytical reaction.","findings":[{"id":"analytical-role-and-endpoint","name":"Analytical role and endpoint","description":"Require an established role and measurable response in the intended complexometric method.","questions":[{"text":"What role does Naphthol Green B perform in the named method, and which analyte, pH, and reagents define that role?","id":"analytical-role-and-endpoint-q01","kind":"definition"},{"text":"What endpoint or response criteria demonstrate acceptable performance for this lot in the intended sample matrix?","id":"analytical-role-and-endpoint-q02","kind":"measurement"},{"text":"Which matrix components or lot impurities require interference checks before use?","id":"analytical-role-and-endpoint-q03","kind":"action"}]}]}]},{"id":"handling-and-disposition","name":"Handling and disposition","description":"Determine supported handling and disposal decisions for the actual dye material.","layers":[{"id":"safety-evidence","name":"Safety evidence","description":"Establish applicable hazard and exposure information.","findings":[{"id":"applicable-safety-record","name":"Applicable safety record","description":"Retain explicit unknowns where current substance or product documentation is incomplete.","questions":[{"text":"Which current SDS covers this lot or preparation, and what GHS classification does it state for the relevant jurisdiction?","id":"applicable-safety-record-q01","kind":"provenance"},{"text":"Is a substance-specific occupational exposure limit established, or must the assessment use applicable general particulate guidance?","id":"applicable-safety-record-q02","kind":"boundary"},{"text":"What controls does the applicable assessment require when weighing the powder or handling its solution?","id":"applicable-safety-record-q03","kind":"action"}]}]},{"id":"storage-and-waste","name":"Storage and waste","description":"Connect stability and mixture composition to retention and disposal.","findings":[{"id":"retention-or-disposition","name":"Retention or disposition","description":"Base storage and waste routing on the documented material and any substances introduced during use.","questions":[{"text":"Which supported storage conditions and requalification interval apply separately to the powder and the prepared solution?","id":"retention-or-disposition-q01","kind":"action"},{"text":"What solvent, metals, or other reagents accompany the dye in the waste and determine its permitted disposal route?","id":"retention-or-disposition-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 Naphthol Green B 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 Naphthol Green B 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 Naphthol Green B this model covers, and on what evidence?","id":"evidence-real-world-use-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 Naphthol Green B 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 Naphthol Green B this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe Naphthol Green B as an acid dye and its uses in staining and colouring.","Report hazard and handling information from safety data sheets."],"mustNot":["Use the dye in food, cosmetics or medicines where it is not approved for that use.","Dispose of dye solutions into drains or waters against local rules.","Handle the powder without the protection its safety data sheet requires.","Mislabel the dye's identity or purity."],"requiresHuman":["Approving a new use of the dye in a product that reaches consumers."]},"ethics":{"considerations":["Dye effluent can pollute waters used by communities.","Workers handling dye powders need protection."],"affectedParties":["Laboratory and dye workers","Communities near waters receiving effluent","Consumers"]},"owners":{"steward":"The laboratory or business that holds it; chemical safety authorities regulate supply and use.","roles":[],"masterSystems":["National chemical inventories"]},"relations":[{"target":"Q11173","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.naphthol-green-b","Wikidata: Q10859529 (https://www.wikidata.org/wiki/Q10859529)"]},"properties":{"applicability":"required","items":["Substance identifiers: Registry vr.tr.naphthol-green-b; CAS 19381-50-1; EC 243-010-2; C.I. 10020; PubChem CID pending verification","Nominal chemical composition: C30H15FeN3Na3O15S3; nominal molar mass 878.46 g/mol","Dye assay and reporting basis: % by mass or method-defined color strength; as-received or dry basis","Water and non-dye content: Water %, insoluble residue %, and identified impurities in mg/kg or %","Physical and preparation state: Powder, dissolved preparation, suspension, precipitated preparation, or unknown; solvent and preparation date","Solution concentration and conditions: g/L or mol/L with assay basis; pH; temperature in °C; solvent composition","Absorption spectrum: Wavelength in nm and absorbance with path length, concentration, solvent, and temperature","Application qualification: Lot linked to a named method, acceptance criteria, reference material, and qualification result","Thermal behavior: Transition or decomposition temperature in °C with method; melting and boiling behavior unresolved","Applicable safety classification: Supplier SDS, revision date, jurisdiction, composition coverage, and verified classification or explicit unknown"]},"recognition":{"applicability":"required","items":["A dark green powder that gives a green solution in water.","Containers labelled with the dye name or Colour Index designation."]},"capabilities":{"applicability":"required","items":["Reconcile an incoming material record with Naphthol Green B identity and flag conflicting identifiers.","Calculate a dye preparation using a documented assay and moisture basis.","Compare a lot's spectrum and dissolution behavior with an authenticated reference.","Qualify or reject a lot for a specified staining or complexometric method using explicit acceptance criteria.","Investigate precipitation, loss of color strength, or spectral change before reusing a preparation.","Select handling, storage, and waste-routing actions from applicable safety documentation."]},"hazards":{"applicability":"required","items":["Eye and skin irritation from dust.","Water pollution from dye effluent.","Staining of skin and surfaces."]},"interfaces":{"applicability":"required","items":["Globally Harmonized System of Classification and Labelling of Chemicals (GHS), United Nations."]},"context":{"applicability":"required","items":["This green acid dye is encountered in dye chemistry, laboratory staining and the colouring of compatible materials.","Research laboratories also use it as a coloured substance in studies of adsorption, dye removal and solution behaviour."]}},"sources":[{"title":"Wikidata item Q10859529: Naphthol Green B","url":"https://www.wikidata.org/wiki/Q10859529","note":"identity and sense of the item"},{"title":"Wikipedia: Naphthol Green B","url":"https://en.wikipedia.org/wiki/Naphthol_Green_B","note":"general description of the item"}],"openQuestions":["Which authoritative structural record and PubChem CID best represent this registry entry, including coordination and tautomeric conventions?","What reference methods and acceptance limits reliably distinguish dye assay, color strength, water content, and non-dye impurities across grades?","What quantitative solubility and solution-stability data are available across relevant solvents, pH values, temperatures, and concentrations?","Which measured thermal events represent melting or decomposition, and is any reported boiling point physically meaningful for this substance?","Which current hazard classifications, exposure limits, and method-specific staining or complexometry claims are supported by directly reviewed documentation?"],"resources":{"spec":"/models/things/publications/thing-q10859529/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q10859529/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T11:30:55Z","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 2026-10-07T10:10:25+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}