Independent · non-commercial · publishes on a quarterly cycle|Current cycle 2026 Q3
Methodology|Interests|Funding|Corrections
Compound Evidence InstituteEvidence synthesis · established 2023Graded assessments of compounds, trials, methods and supply
Document set current to 30 July 2026
Defined term · Analytical chemistry

Identity

Confirmation that the material is the substance claimed. Retention-time correspondence alone is weak evidence of identity; mass-spectrometric confirmation of the expected mass is stronger; sequence…

Document identifier
CEI-GT-146
Series
Defined term
Version
1.0
Published
30 Jul 2026
Last reviewed
30 Jul 2026
Certainty
Not rated

§1Identity

§1.2Category

Analytical chemistry — Terms describing the determination of identity, purity, content and quality.

§1.3Related terms

  • Orthogonal method — A second analytical method resting on a different physical principle from the first. Identity confirmed by two orthogonal methods is materially stronger than identity…
  • Peptide mapping — Enzymatic digestion followed by chromatographic and mass-spectrometric analysis of the resulting fragments, used to confirm sequence. Rarely performed on research-supply…
Compound Evidence Institute · CEI-GT-146 · https://compoundevidence.com/glossary/identity/ · retrieved 30 July 2026
Nothing published by the Institute is medical advice, a diagnosis, a prescription, a treatment recommendation or a purchasing recommendation. Compounds supplied for research use are not approved for human or veterinary use in any jurisdiction, and a favourable analytical assessment of a supplier is not a statement that any product is safe or effective. The Institute publishes certainty ratings and never recommendations. No telephone number, messaging handle or ordering channel appears anywhere on this site.