COA VERIFICATION
How to Read Your COA
Every order includes a Certificate of Analysis. Here is what each section means and how to verify your batch documentation.
Batch identification
The batch number is the primary identifier linking your product to its analytical records. This unique code connects to manufacturing date, test results, and chain of custody.
- Batch Number — Unique ID printed on vial label and COA
- Manufacturing Date — When the batch was synthesized
- Expiration Date — Recommended use-by date for research purposes
- Product Name / Compound — The specific research material
Purity results
Purity is reported as a percentage determined by HPLC analysis. This measures the proportion of the target compound relative to any impurities in the sample.
- HPLC Purity % — Target compound concentration (typically 98%+)
- Method — The specific HPLC protocol used (e.g., RP-HPLC)
- Molecular Weight (MS) — Confirmed via mass spectrometry
- Appearance — Physical description (lyophilized powder, solution, etc.)
Lab information
Each COA identifies the testing laboratory and analyst. This allows independent verification of results.
- Laboratory Name — The third-party lab that performed testing
- Test Date — When the analysis was conducted
- Analyst / Reviewer — Lab personnel responsible for the results
- Microbial Results — Endotoxin and bioburden screening outcome
Verification steps
To verify your COA, match the batch number on your vial label to the batch number on the COA document. All fields should be consistent.
- Match batch ID on vial label to COA document
- Confirm compound name and molecular weight match
- Review test date — should precede your order date
- Check that lab name and analyst fields are populated
- Contact support if anything does not match