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Compound Evidence InstituteEvidence synthesis · established 2023Graded assessments of compounds, trials, methods and supply
Document set current to 30 July 2026
Defined term · Regulatory

CAS number

A unique identifier assigned to a chemical substance by the Chemical Abstracts Service. An identifier and not a statement of legal or quality status.

Document identifier
CEI-GT-182
Series
Defined term
Version
1.0
Published
30 Jul 2026
Last reviewed
30 Jul 2026
Certainty
Not rated

§1CAS number

§1.1Also known as

CAS registry number

§1.2Category

Regulatory — Terms describing the status of a compound before a competent authority.

§1.3Related terms

  • Identity — Confirmation that the material is the substance claimed. Retention-time correspondence alone is weak evidence of identity; mass-spectrometric confirmation of the…
Compound Evidence Institute · CEI-GT-182 · https://compoundevidence.com/glossary/cas-number/ · retrieved 30 July 2026
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