How to read a certificate of analysis

What the identity, purity, and mass sections of a COA actually tell you.

Everything ProPeptide ships is documented per batch. The point of a certificate of analysis is to move from “trust us” to a measurement you can check — identity confirmed, purity quantified by HPLC, and the lot recorded.

Handling matters as much as sourcing. Lyophilized compounds are kept cold and desiccated, reconstituted with bacteriostatic water, and stored to preserve stability between uses.

For laboratory research use only. Not for human or veterinary use. This article is general handling information, not guidance for any other application.