A Certificate of Analysis (COA) is a document issued by the manufacturer or an independent lab that details the test results for a specific batch of product.
For research peptides, a COA typically includes identity confirmation, purity analysis, and sometimes additional tests like endotoxin screening or amino acid analysis.
- Identity: confirmed by mass spectrometry (MS) showing the expected molecular weight.
- Purity: determined by HPLC, typically expressed as a percentage.
- Appearance: visual description of the compound (white powder, clear solution, etc.).
- Batch/lot number: for traceability and reproducibility.