Short answer: Verify identity through an explicit reference identity, suitable analytical evidence and a sample-to-lot trace; a product name on a vial is insufficient.
What to establish
Start with the proposed sequence, form, salt or counterion if relevant, lot ID and the supplier’s stated identity test. Check that the report and label describe the same material. Resolve aliases and stereochemical or modification differences before ordering a method.
What to verify
Ask a qualified laboratory which orthogonal evidence is appropriate to the question. LC-MS may support molecular-mass assignment; chromatographic comparison or other techniques may address different ambiguities. Do not describe a single matching peak as full structural proof.
Decision and next step
Record method, acceptance criterion, actual result and interpretation, including limitations. If the tested item is a pre-purchase sample, repeat the identity link for the later supplied lot rather than assuming equivalence.
Practical request
Use the points above to request a defined product, sample or lot record. Ask the document issuer to explain any discrepancy; do not infer regulatory suitability from a catalog listing.
Related guides
Primary sources
Educational procurement guidance. Confirm the current rules for the exact material, market and intended use before purchase or use.
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