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Vocabulary Reference

casNumber

property Authorized Only

CAS Number

Chemical Abstracts Service registry number.

URI:https://ref.openepcis.io/extensions/common/core/casNumber

Used on

HazardousSubstanceSubstanceOfConcern

Domain

HazardousSubstance

Range

xsd:string

Vocabulary alignment

Equivalent
CIRPASS-2cirpass2:numberCAS · QA 99%
Close match
DPP Keystonedppk:componentCasNumber · QA 60%

QA % is the verifier panel's confidence. Curated mappings graded by openai/gpt-oss-20b, verified by local QA panels per round (claude-opus-4-8 / qwen3.5-27b / qwen3-32b).

Referenced upstream terms

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Where used

Referenced by other terms (1)

In SHACL shapes (2)

  • MaterialCompositionShapeconstrains
  • SubstanceOfConcernShapeconstrains

References

Access Level

Substance registry numbers combined with fractions enable full formulation reconstruction; they serve professional and authority use (battery Annex XIII(2) precedent).

JSON-LD Example 

{
  "type": "HazardousSubstance",
  "casNumber": "..."
}