What Is a Certificate of Analysis?
A Certificate of Analysis (COA) is a document issued by a testing laboratory that reports the results of quality control testing performed on a specific batch of product. For research peptides, a COA provides objective evidence of identity, purity, and quality — essential information for researchers who need reliable materials.
Key Sections of a Peptide COA
Product identification: Peptide name, sequence, molecular weight, batch/lot number, and manufacturing date. Purity by HPLC: The percentage of the target peptide in the sample, determined by analytical HPLC. Look for 99%+ for research-grade material. Mass spectrometry: Confirms the molecular identity matches the expected molecular weight. Appearance: Physical description (typically white to off-white lyophilized powder). Solubility: Confirms the peptide dissolves properly in specified solvents.
How to Verify a COA
A legitimate COA should include the testing laboratory name and accreditation, specific batch/lot number matching your product, actual numerical results (not just pass/fail), testing methodology details, date of analysis, and analyst signature or authorization.
Red Flags
Be cautious of COAs that show no specific batch number, generic results not tied to a specific lot, no laboratory identification, results that seem templated rather than measured, or missing methodology information.
Full Scale Peptides COAs
Every Full Scale Peptides product includes a batch-specific COA from independent third-party testing. Our COAs are available on our website at fullscalepeptides.com/coa/ and include complete HPLC chromatograms and mass spectrometry data for full transparency.