What a COA is
A Certificate of Analysis reports analytical results for one specific production lot. Read it as evidence about that lot, not as a general claim about every material with the same name.
Identity and purity
Identity results should connect the intended molecule to an observed measurement, while chromatographic purity describes the relative peak area under the stated method.
Purity percentage is not the same as net peptide content and does not account for every non-UV-absorbing component.
Lot, method and date
Match the lot number on the report to the container and receiving record. Check the named method, analysis date, issuing source and any stated acceptance criteria.
Limitations
A report covers only the tests it lists. An omitted test is not evidence that the unreported attribute passed.
For laboratory research documentation only. This guide is not medical advice and does not describe use in humans or animals.
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