COA & batch-number guide
A certificate of analysis records claims about a sample and the tests reported on it. A supplier-published COA is not independent Peptide Scanner verification.
Match the exact sample, not just the product name
Check supplier, product, nominal size, labelled batch/lot and report date against the original. A size match alone does not establish that your vial or current stock belongs to the tested batch. Missing or conflicting fields remain unknown.
Keep the measurements separate
- Chromatographic purity describes a method-specific peak-area result, not the amount in a vial.
- Absolute content needs a validated quantitative method and appropriate reference material.
- Molecular-mass agreement alone does not establish full sequence identity.
- Purity and identity do not establish sterility, endotoxin levels, or safety for human use.
Look for traceable evidence
Preserve original bytes, source URL, retrieval time and SHA-256. A hash demonstrates byte integrity, not the truth of laboratory claims. Check the issuing laboratory and its relevant method scope independently before relying on a result.