Certificates of analysis are batch-specific. A certificate issued for one lot describes that lot and nothing else, which is why records here are listed per batch rather than per product.
We state a result only where documentation for that exact batch supports it. We do not claim sterility, pharmaceutical grade or GMP manufacture — those are separate certifications, not batch measurements, and we do not hold them. We do not state a purity figure without a certificate behind it.
Certificates of analysis are available on request where batch documentation is held. We do not publish a public batch database. If you need to know what documentation exists for a particular lot, ask us and we will tell you plainly what we hold and what we do not.
If you are not sure what an HPLC purity figure measures, how it differs from net peptide content, or what a certificate cannot tell you, our library covers it in detail: What is a peptide COA?