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coaeducation
How to actually read a certificate of analysis
The Sun God
Jun 20, 2026
A COA is only as good as your ability to read it. Lot numbers, methods, and the numbers that matter.
The receipts, decoded
A certificate of analysis (COA) is the document that backs every claim we make. Here's what to look for.
Lot number
It should match the vial. If it doesn't, walk away.
Method
HPLC-MS is the standard for purity. The method should be stated explicitly.
The number
Purity percentage. We publish ours. Cross-check it against the lot.
For research use only. Not for human consumption.
For research use only
For research use only. Not for human consumption.