QUALITY DOCUMENTATION
Third-Party Peptide Testing Guide
A third-party report is useful only when the buyer can identify the tested sample, analytical scope and relationship between that sample and the proposed supply batch.
Identify the tested sample
Check the product name, sample identifier, report number and report date. A result for one submitted sample should not be treated as evidence for every future batch or every catalog item.
Separate purity from content
Purity and peptide content answer different analytical questions. Compare results only after confirming the method, units, sample basis and specification used by the laboratory.
Treat endotoxin as a separate test scope
An endotoxin result should be reviewed as its own analytical test. Do not assume a purity or content report includes endotoxin unless the report explicitly states it.
Verify the original report
When a laboratory provides a verification page or report number, use the original source and match the complete identifier. Screenshots or cropped report images are less useful if the underlying record cannot be verified.
Connect testing to the proposed order
Ask which report applies to the quoted batch and whether new testing is available or required. Buyers may also arrange independent testing of received material when that is part of their quality process.
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Third-party report library · COA library · COA verification guide · Supplier checklist