Certificate of Analysis (COA)
A COA summarises the results and specifications associated with a specific batch. It is the most commonly requested document in professional peptide enquiries. Buyers should confirm that the COA matches the exact SKU and strength they are evaluating.
HPLC
High-performance liquid chromatography (HPLC) is used to assess purity and component separation. For peptide buyers, HPLC data can help confirm consistency between batches and support quality conversations with end customers.
LC-MS
Liquid chromatography-mass spectrometry (LC-MS) combines separation with molecular-weight confirmation. This document is particularly useful when verifying peptide identity and molecular weight against a known standard.
Sequence and molecular weight
A sequence report confirms the amino-acid order of the peptide. Molecular-weight data confirms the expected mass. These two documents are especially important for products with naming variations across suppliers, such as certain CJC-1295 and TB-500 presentations.
MSDS and handling information
A Material Safety Data Sheet (MSDS) provides handling, storage, and transport guidance. It is essential for logistics, import, and warehouse teams rather than end consumers.
What to request
Ask for the documents that match your market and customer requirements. Not every buyer needs every report, but the supplier should be able to confirm availability and scope before a quotation is finalised.