{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-13T00:40:15Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 3, "engine": "claude", "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T10:00:00Z", "ingestedAt": "2026-10-06T07:05:55+00:00", "fields": [ "agent_conduct", "ethics", "owners" ] }, "revisions": [ { "at": "2026-10-06T22:57:18+00:00", "engine": "codex", "fields": [ "definition" ], "answering_review": "e3de08a6fdd380c28bf1d4f6277fda51abec04d6d84667d6439e4bf340fd793d" } ], "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:32+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q725", "registryId": "vr.tr.chromium", "name": "chromium", "version": "0.2.0-wave.3", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q725/", "model": { "registry_id": "vr.tr.chromium", "name": "chromium", "purpose": "Let an agent identify chromium and its properties, relay production, uses, isotopes and health effects from reference sources, distinguish trivalent from hexavalent chromium, and route exposure questions to occupational health authorities.", "definition": "A chemical element with symbol Cr and atomic number 24, a hard, lustrous, corrosion-resistant transition metal obtained from chromite ore, used above all in stainless steel and other alloys, in chrome plating, pigments, leather tanning and refractories; whether trivalent chromium has an essential nutritional role in humans is disputed, hexavalent chromium compounds are toxic and carcinogenic, and chromium is a common contact allergen, with four stable isotopes and radioactive ones from chromium-42 upward.", "what_it_is_for": "Stainless steel, plating, pigments and tanning.", "affordances": [ "relay properties and isotopes", "explain production and uses", "distinguish oxidation states and health effects", "route exposure questions" ], "distinguishing_features": [ "Corrosion resistance", "Stainless steel component", "Toxic hexavalent state", "Contact allergen" ], "appearance": "A silvery, hard, bright metal that takes a high polish.", "visual_identification": [ "Element 24, symbol Cr", "Metal of stainless steel and chrome plating", "Vanadium and manganese are the neighbouring elements" ], "physical_properties": [ { "quantity": "atomic number", "typical_range": "24", "unit": "Z", "note": "" }, { "quantity": "standard atomic weight", "typical_range": "51.996", "unit": "u", "note": "" }, { "quantity": "melting point", "typical_range": "1907", "unit": "degrees C", "note": "" }, { "quantity": "Mohs hardness", "typical_range": "8.5", "unit": "scale", "note": "" } ], "families_and_kinds": [ "chromium metal and ferrochrome", "trivalent chromium compounds", "hexavalent chromium compounds such as chromates", "chromium pigments such as chrome yellow and chromium oxide green", "stable isotopes 50, 52, 53 and 54 and radioactive isotopes such as chromium-51" ], "related_models": [ { "relation": "is a kind of", "target": "heavy metal", "why": "in registry terms" }, { "relation": "is a kind of", "target": "allergen", "why": "in registry terms" }, { "relation": "is a kind of", "target": "simple substance", "why": "in registry terms" }, { "relation": "is used in", "target": "stainless steel", "why": "the main application" } ], "identifiers": [ { "scheme": "symbol", "value_or_pattern": "Cr", "note": "" }, { "scheme": "CAS", "value_or_pattern": "7440-47-3", "note": "" } ], "standards_and_regulation": [ "Occupational exposure limits for hexavalent chromium", "REACH restrictions on chromium VI in leather and articles", "Drinking water standards", "RoHS limits in electronics" ], "failure_modes_and_hazards": [ "Hexavalent chromium toxicity and cancer", "Contact dermatitis from chromium in cement and leather", "Groundwater contamination", "Confusing oxidation states" ], "in_scope": [], "out_of_scope": [], "characteristics": [], "agent_conduct": { "may": [ "Report chromium's chemistry, ores and industrial uses from reliable references.", "Distinguish the different oxidation states clearly in any report or label." ], "must_not": [ "Treat all chromium compounds as equally safe when some states are toxic and carcinogenic.", "Handle chromium compounds or dust without the controls the material requires.", "Discharge chromium-bearing effluent to drains, soil or water.", "Misstate chromium content or supplement claims for health products." ], "requires_human": [ "Any handling or disposal of chromium compounds, which belongs to a trained operator.", "Decisions about remediation of a contaminated site." ] }, "ethics": { "considerations": [ "Chromium contamination from plating and tanning has poisoned groundwater used by communities.", "Workers in plating and tanning bear the heaviest exposure." ], "affected_parties": [ "Plating and tanning workers", "Communities near contaminated sites", "Water users downstream" ] }, "owners": { "steward": "Nobody owns the element; the operator or site holder answers for the material and its waste.", "master_systems": [] } }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q725: chromium", "url": "https://www.wikidata.org/wiki/Q725", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: Chromium", "url": "https://en.wikipedia.org/wiki/Chromium", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "identify", "name": "Identify", "description": "What chromium is.", "rationale": "Identity.", "layers": [ { "id": "properties", "name": "Properties", "description": "Properties.", "findings": [ { "id": "properties-finding", "name": "Properties", "description": "Properties.", "questions": [ { "text": "What are the physical and chemical properties of chromium?", "kind": "definition" }, { "text": "Is the question about the metal, a trivalent compound or a hexavalent compound?", "kind": "boundary" } ] } ] }, { "id": "isotopes", "name": "Isotopes", "description": "Isotopes.", "findings": [ { "id": "isotopes-finding", "name": "Isotopes", "description": "Isotopes.", "questions": [ { "text": "Which isotopes exist, and how is chromium-51 used in medicine?", "kind": "definition" }, { "text": "Which entry fits the specific isotope?", "kind": "action" } ] } ] } ] }, { "id": "source", "name": "Source", "description": "Production and supply.", "rationale": "Supply.", "layers": [ { "id": "production", "name": "Production", "description": "Production.", "findings": [ { "id": "production-finding", "name": "Production", "description": "Production.", "questions": [ { "text": "How is chromium produced from chromite as ferrochrome and metal?", "kind": "provenance" }, { "text": "Which entry fits chromite?", "kind": "action" } ] } ] }, { "id": "supply", "name": "Supply", "description": "Supply.", "findings": [ { "id": "supply-finding", "name": "Supply", "description": "Supply.", "questions": [ { "text": "Who produces chromium, and how is it traded, with sources?", "kind": "measurement" }, { "text": "Which sources are cited?", "kind": "provenance" } ] } ] } ] }, { "id": "use", "name": "Use", "description": "Uses and health.", "rationale": "Application.", "layers": [ { "id": "uses", "name": "Uses", "description": "Uses.", "findings": [ { "id": "uses-finding", "name": "Uses", "description": "Uses.", "questions": [ { "text": "How is chromium used in steel, plating, pigments, tanning and refractories?", "kind": "provenance" }, { "text": "Which references are standard?", "kind": "provenance" } ] } ] }, { "id": "health", "name": "Health", "description": "Health and environment.", "findings": [ { "id": "health-finding", "name": "Health", "description": "Health.", "questions": [ { "text": "What are the health effects of trivalent and hexavalent chromium, and what limits apply, in general terms?", "kind": "provenance" }, { "text": "Is the user asking about personal exposure, which needs occupational health or medical advice?", "kind": "boundary" } ] } ] } ] }, { "id": "context", "name": "Context", "description": "History and cases.", "rationale": "Context.", "layers": [ { "id": "discovery", "name": "Discovery", "description": "Discovery.", "findings": [ { "id": "discovery-finding", "name": "Discovery", "description": "Discovery.", "questions": [ { "text": "How was chromium discovered by Vauquelin in 1797 and named for its coloured compounds?", "kind": "provenance" }, { "text": "Which entry fits the history of chemistry?", "kind": "action" } ] } ] }, { "id": "cases", "name": "Cases", "description": "Contamination cases.", "findings": [ { "id": "cases-finding", "name": "Cases", "description": "Cases.", "questions": [ { "text": "What notable hexavalent chromium contamination cases have been documented, as reported?", "kind": "provenance" }, { "text": "Which entry fits the specific case?", "kind": "action" } ] } ] } ] } ] }, "openQuestions": [ "Should hexavalent chromium be a separate primary entry?", "How should exposure limits be linked?", "The registry entry has merged aliases naming isotopes; should they be split off?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }