Purity reports are most useful when they are tied to a specific material and lot. HPLC can help a laboratory assess chromatographic purity, while identity normally requires complementary information.

Read the report in context

• Confirm the material and sample identifier.
• Find the lot reference and test date.
• Review the chromatogram and integration method.
• Check whether identity is supported separately.
• Keep the report with the receiving record.

What the percentage does not tell you

A percentage alone does not establish identity, sterility, endotoxin status, handling history or suitability for a particular method. Those questions require their own evidence and acceptance criteria.

This article concerns laboratory documentation only. It is not medical guidance.