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Read a COA. Know what it covers.

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Six checks to read a certificate with context. Record what you know, flag unanswered questions, then print or save your worksheet as a PDF.

This is a documentation checklist, not a laboratory assessment, product approval, or guidance for human use. Your entries stay in this page and are not submitted or saved by Aminos. Closing or reloading clears them.

Your review

Choose “Documented,” “Needs clarification,” or “Not applicable” for each check. Nothing is pre-approved.

01 Identity

Does the report identify the same compound or blend?

Look for an identity method such as mass spectrometry and its result. A high purity number alone does not identify the material.

02 Lot & strength

Do the sample, strength and lot match the item you are evaluating?

Compare the vial label, product listing and report. A certificate for another strength or lot is not a match.

03 Purity

Are the purity result and analytical method stated?

Chromatographic purity describes the measured signal under that method. It is not the amount in the vial and does not exclude every contaminant.

04 Content & units

Is the measured content clear, with units and a measurement basis?

Distinguish total milligrams per vial from milligrams per millilitre, concentration, and gross powder weight. Confirm how net content was measured.

05 Dates & provenance

Can you verify the report, accession and relevant dates with the lab?

Check receipt and report dates, lab identity and the original file. A report date is not a shelf-life or expiry determination.

06 Tests & gaps

Have you checked which tests your laboratory protocol requires?

List what is reported and what is missing. Endotoxin and sterility are different tests; neither follows from HPLC purity. Consider residual solvents, metals, water, counterions and stability when relevant to the intended laboratory work.

0 of 6 checks reviewed. Unanswered checks remain unknown.

Worksheet: aminos.science/coa-checklist/ · For laboratory research documentation only.

Further reading: Bachem’s guide to quality control of amino acids and peptides ↗. Required tests depend on your laboratory protocol.