{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.n-aminoethylpiperazine","code":"thing-q3887815","url":"https://ver.cy/models/thing/q3887815/","name":"N-aminoethylpiperazine","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":"N-aminoethylpiperazine is an organic amine of formula C6H15N3 consisting of a piperazine ring with a 2-aminoethyl substituent on one ring nitrogen, giving it primary, secondary and tertiary amine functionalities.","purpose":"Enable an agent to identify N-aminoethylpiperazine, assess a particular material lot, and determine its suitability for a proposed use under documented handling constraints.","scope":{"in":["Molecular identity and identifier reconciliation for N-(2-aminoethyl)piperazine.","Commercial grade, assay, water content and identified impurities.","Physical state and measured properties with temperature, pressure and method.","Amine functionality, protonation and application-relevant reactivity.","Substance-specific hazard, exposure, storage and regulatory evidence."],"out":["Complete epoxy hardener, catalyst or corrosion inhibitor formulations containing this substance.","Manufacturing plants, synthesis procedures and process equipment.","Piperazine and other substituted piperazines as independent substances.","Isolated salts, derivatives and reaction products as independent chemical identities.","Finished polymer performance and workplace-wide exposure control systems."],"boundaries":[]},"distinguishingFeatures":["Confirm a piperazine ring with a two-carbon aminoethyl substituent attached to one ring nitrogen; this distinguishes it from unsubstituted piperazine and carbon-substituted isomers. [NIST identity record](https://webbook.nist.gov/cgi/cbook.cgi?ID=140-31-8)","Check for one terminal primary amine, one secondary ring amine and one tertiary ring amine; this distinguishes its functionality from fully substituted piperazines. [Nouryon product data](https://www.nouryon.com/globalassets/inriver/resources/pds-aminoethylpiperazine-aep-en.pdf)","Match CAS 140-31-8 and InChIKey IMUDHTPIFIBORV-UHFFFAOYSA-N to the structure rather than accepting the abbreviation AEP alone. [NIST identity record](https://webbook.nist.gov/cgi/cbook.cgi?ID=140-31-8)","Verify whether the supplied material is the free base, a solution or a salt; detecting the aminoethylpiperazine component alone does not establish that the entire material is neat N-aminoethylpiperazine."],"structure":{"bundles":[{"id":"identity-and-material-boundaries","name":"Identity and material boundaries","description":"Establish which aminoethyl-substituted piperazine is represented and what a supplied material contains.","layers":[{"id":"molecular-recognition","name":"Molecular recognition","description":"Resolve names against the specific molecular connectivity.","findings":[{"id":"aminoethyl-attachment","name":"Aminoethyl attachment","description":"Recognize N-(2-aminoethyl)piperazine through its structure-linked identity. [NIST](https://webbook.nist.gov/cgi/cbook.cgi?ID=140-31-8)","questions":[{"text":"Does the structure place the terminal amino group two carbons away from a piperazine ring nitrogen?","id":"aminoethyl-attachment-q01","kind":"definition"},{"text":"Which authoritative record links the supplied name and CAS number to this connectivity?","id":"aminoethyl-attachment-q02","kind":"provenance"}]}]},{"id":"supplied-material-identity","name":"Supplied material identity","description":"Separate molecular identity from the composition of a container or product.","findings":[{"id":"free-base-and-related-forms","name":"Free base and related forms","description":"Record whether the material is neat free base, a solution or a chemically distinct salt, and link neighbouring identities where needed.","questions":[{"text":"Does the supplied material contain solvent, counterions or other amines that change its identity or composition?","id":"free-base-and-related-forms-q01","kind":"boundary"},{"text":"Which supplier document and analytical evidence establish the actual supplied form?","id":"free-base-and-related-forms-q02","kind":"provenance"}]}]}]},{"id":"lot-composition-and-condition","name":"Lot composition and condition","description":"Assess the quality and present condition of an aminoethylpiperazine lot.","layers":[{"id":"assay-and-moisture","name":"Assay and moisture","description":"Quantify aminoethylpiperazine content independently of water and analytical reporting conventions.","findings":[{"id":"composition-basis","name":"Composition basis","description":"Require an explicit assay basis and separate moisture result; chromatographic area percentage must not silently become mass purity.","questions":[{"text":"What are the measured aminoethylpiperazine assay and water content, and how were they determined?","id":"composition-basis-q01","kind":"measurement"},{"text":"Is the assay reported on an as-received, dry-mass or chromatographic area basis?","id":"composition-basis-q02","kind":"definition"}]}]},{"id":"impurities-and-lot-change","name":"Impurities and lot change","description":"Track identified contaminants and changes since release.","findings":[{"id":"fitness-after-storage","name":"Fitness after storage","description":"Compare current analytical and appearance evidence with the certificate of analysis and the intended application's acceptance criteria.","questions":[{"text":"Which related amines or other impurities are detected, at what concentrations and detection limits?","id":"fitness-after-storage-q01","kind":"measurement"},{"text":"Do changes in moisture, color or homogeneity require resampling or restriction of the proposed use?","id":"fitness-after-storage-q02","kind":"action"}]}]}]},{"id":"physical-state-and-transfer","name":"Physical state and transfer","description":"Connect observed phase and physical properties to storage and material movement.","layers":[{"id":"phase-envelope","name":"Phase envelope","description":"Retain temperature, pressure and composition behind thermal-property evidence.","findings":[{"id":"conditioned-transition-values","name":"Conditioned transition values","description":"Treat reported freezing and boiling points as evidence with a defined material and measurement context.","questions":[{"text":"What phase is observed at the current temperature, and is it consistent with the lot's composition?","id":"conditioned-transition-values-q01","kind":"measurement"},{"text":"Which pressure, purity and method accompany each freezing or boiling value used for planning?","id":"conditioned-transition-values-q02","kind":"provenance"}]}]},{"id":"flow-and-solution-properties","name":"Flow and solution properties","description":"Characterize liquid handling and dilution using properties appropriate to the actual composition.","findings":[{"id":"transfer-property-applicability","name":"Transfer property applicability","description":"Keep neat-material density and viscosity separate from solution measurements.","questions":[{"text":"What density and viscosity apply at the proposed transfer temperature and aminoethylpiperazine concentration?","id":"transfer-property-applicability-q01","kind":"measurement"},{"text":"Does the proposed dilution or transfer require additional thermal or equipment-compatibility evidence?","id":"transfer-property-applicability-q02","kind":"action"}]}]}]},{"id":"amine-functionality-and-use","name":"Amine functionality and use","description":"Represent the consequences of aminoethylpiperazine's different nitrogen environments.","layers":[{"id":"nitrogen-site-behaviour","name":"Nitrogen site behaviour","description":"Distinguish nitrogen environments and the conditions affecting their availability.","findings":[{"id":"basicity-versus-reactive-capacity","name":"Basicity versus reactive capacity","description":"Record acid-base measurements separately from reaction-specific equivalent measurements.","questions":[{"text":"What evidence establishes protonation behaviour under the proposed solvent, concentration and temperature conditions?","id":"basicity-versus-reactive-capacity-q01","kind":"measurement"},{"text":"Does the reported amine value measure neutralization capacity or support the specific reaction being considered?","id":"basicity-versus-reactive-capacity-q02","kind":"boundary"}]}]},{"id":"application-fitness","name":"Application fitness","description":"Link substance properties to a proposed role without importing whole-product performance.","findings":[{"id":"role-specific-qualification","name":"Role-specific qualification","description":"Supplier literature identifies epoxy-hardener, urethane-catalyst and corrosion-inhibitor applications; each proposed use still requires qualification. [Nouryon](https://www.nouryon.com/globalassets/inriver/resources/pds-aminoethylpiperazine-aep-en.pdf)","questions":[{"text":"Is aminoethylpiperazine intended to act as a consumed reactant, catalyst or formulation component?","id":"role-specific-qualification-q01","kind":"definition"},{"text":"Which application tests establish acceptable moisture, impurity and reactive-equivalent limits for this lot?","id":"role-specific-qualification-q02","kind":"action"}]}]}]},{"id":"hazards-and-handling-constraints","name":"Hazards and handling constraints","description":"Attach applicable hazard evidence and operational restrictions to the identified material.","layers":[{"id":"health-and-exposure-evidence","name":"Health and exposure evidence","description":"Resolve applicable hazard classifications and exposure criteria.","findings":[{"id":"applicable-safety-record","name":"Applicable safety record","description":"Record SDS-supported health classifications and exposure limits without inferring safety from missing entries.","questions":[{"text":"What acute-toxicity, corrosion, eye-damage and sensitization classifications appear in the applicable SDS, and under which jurisdiction?","id":"applicable-safety-record-q01","kind":"provenance"},{"text":"Is there a substance-specific occupational exposure limit, and what authority, units and averaging period define it?","id":"applicable-safety-record-q02","kind":"measurement"}]}]},{"id":"storage-transfer-and-transport","name":"Storage, transfer and transport","description":"Determine operational constraints using compatibility and regulatory evidence.","findings":[{"id":"operation-specific-constraints","name":"Operation-specific constraints","description":"Assess packaging, contact materials, incompatible substances and transport requirements for the actual supplied material.","questions":[{"text":"Which SDS or compatibility tests support the proposed container, seals, storage temperature and segregation arrangements?","id":"operation-specific-constraints-q01","kind":"action"},{"text":"Which transport designation and classification apply to this composition, shipment mode and jurisdiction?","id":"operation-specific-constraints-q02","kind":"provenance"}]}]}]},{"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 N-aminoethylpiperazine 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 N-aminoethylpiperazine this model covers, and on what evidence?","id":"evidence-identifiers-q01","kind":"provenance"}]},{"id":"evidence-standards-and-regulation","name":"Standards and regulation","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these standards and regulation hold for the sense of N-aminoethylpiperazine this model covers, and on what evidence?","id":"evidence-standards-and-regulation-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 N-aminoethylpiperazine 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 N-aminoethylpiperazine 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 N-aminoethylpiperazine this model covers, and on what evidence?","id":"evidence-failure-modes-and-hazards-q01","kind":"provenance"}]},{"id":"evidence-regional-variation","name":"Regional variation","description":"Recalled without web access and unsourced; every item is a lead to verify.","questions":[{"text":"Which of these regional variation hold for the sense of N-aminoethylpiperazine this model covers, and on what evidence?","id":"evidence-regional-variation-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 N-aminoethylpiperazine this model covers, and on what evidence?","id":"evidence-neighbours-q01","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe its uses, for example as an epoxy curing agent or chemical intermediate.","Read safety data sheets and report hazards and storage needs to the user."],"mustNot":["Handle or transfer it without the protective equipment its safety data sheet requires.","Store it with acids or oxidisers it can react with.","Release it to drains, soil or water.","Relabel or decant it into unmarked containers."],"requiresHuman":["Approving bulk use or disposal on a site."]},"ethics":{"considerations":["Workers who handle amines can suffer burns and lasting skin sensitisation."],"affectedParties":["Workers handling it","People downstream of spills"]},"owners":{"steward":"The business or laboratory that holds it; the supplier answers for its labelling.","roles":[],"masterSystems":["Chemical substance inventories such as the EU REACH registration database"]},"relations":[{"target":"Q11173","type":"parent","note":"registry parent class"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.n-aminoethylpiperazine","Wikidata: Q3887815 (https://www.wikidata.org/wiki/Q3887815)"]},"properties":{"applicability":"required","items":["Molecular identity: C6H15N3; molar mass approximately 129.20 g/mol; CAS 140-31-8. [NIST](https://webbook.nist.gov/cgi/cbook.cgi?ID=140-31-8)","Registry cross-references: PubChem CID 8795; EC 205-411-0, with issuing authority and identity scope. [PubChem](https://pubchem.ncbi.nlm.nih.gov/compound/8795)","Material form: Free base; solution with solvent and concentration; salt-related material requiring a linked identity.","Assay and impurity profile: Mass % N-aminoethylpiperazine and each quantified impurity; analytical method and reporting basis.","Water content: Mass % or mg/kg, with method and sampling date.","Phase and thermal transitions: Observed phase; freezing and boiling temperatures in °C with pressure; supplier examples are -19 °C and 220.4 °C at 1013 hPa. [Nouryon](https://www.nouryon.com/globalassets/inriver/resources/pds-aminoethylpiperazine-aep-en.pdf)","Density and viscosity: kg/m³ and mPa·s, with temperature, composition and method.","Amine capacity and protonation: Amine value in mg KOH/g; measured reactive equivalent weight in g/eq; pH at specified concentration; protonation evidence.","Lot condition: Appearance, color, homogeneity, container integrity, sampling date and deviations from the lot specification.","Hazard and regulatory applicability: Applicable SDS, GHS implementation, exposure limits and transport classification, each with jurisdiction and revision date."]},"recognition":{"applicability":"required","items":["A colourless to pale yellow liquid with an ammonia-like amine smell.","Should be in a labelled container with a corrosive hazard pictogram."]},"capabilities":{"applicability":"required","items":["Authenticate a supplied material against structure-linked identifiers and analytical evidence.","Compare a lot's assay, moisture and impurity profile with application requirements.","Assess whether observed phase and flow properties permit a proposed transfer operation.","Evaluate documented suitability as an epoxy hardener or chemical intermediate without assuming a complete formulation.","Determine whether available SDS and compatibility evidence support a proposed storage or handling action.","Flag unresolved identity, property or safety evidence before releasing a lot for use."]},"hazards":{"applicability":"required","items":["Corrosive to skin and eyes.","Can cause allergic skin reactions with repeated contact.","Harmful to aquatic life if released."]},"interfaces":{"applicability":"required","items":["Globally Harmonized System of Classification and Labelling of Chemicals (GHS), United Nations."]},"context":{"applicability":"required","items":["N-aminoethylpiperazine is encountered in chemical manufacturing as an intermediate and as a component of epoxy curing systems.","Laboratory and industrial assessments use material identity, purity and supplier documentation to determine suitability for a particular formulation or reaction."]}},"sources":[{"title":"Wikidata item Q3887815: N-aminoethylpiperazine","url":"https://www.wikidata.org/wiki/Q3887815","note":"identity and sense of the item"},{"title":"Wikipedia: Aminoethylpiperazine","url":"https://en.wikipedia.org/wiki/Aminoethylpiperazine","note":"general description of the item"}],"openQuestions":["Which current supplier SDS and jurisdiction-specific records establish the applicable GHS classification, transport requirements and occupational exposure limits?","How should conflicting published freezing-point values be reconciled against primary measurements, purity and material form?","Which impurities dominate available commercial grades, and what application-specific limits are justified for each?","What measured protonation constants and reaction-specific equivalent weights are valid under the intended use conditions?","What evidence establishes shelf life, sensitivity to atmospheric exposure and compatibility with proposed container and seal materials?"],"resources":{"spec":"/models/things/publications/thing-q3887815/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q3887815/spec.json"],"providers":["Codex"],"researchStatus":"unreviewed","generatedAt":"2026-09-12T11:29:30Z","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 2026-10-07T10:10:30+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}