How to Read a Certificate of Analysis (COA) Like a Pro
A Certificate of Analysis (COA) is a document that reports testing/analysis results for a specific material or batch. It’s widely used to confirm what was tested and whether results align with predefined specifications.
1) Match the COA to the product lot/batch
Start here every time:
- Product name
- Lot/Batch number
- Date of issue
If the lot number doesn’t match what you ordered, it’s the wrong COA.
2) Look for identity + key tests (what’s actually measured)
COAs vary by supplier and product type, but commonly include:
- Test name (what was measured)
- Method (how it was measured)
- Result (the measured value)
- Specification/acceptance criteria (the target range)
COAs are meant to be clear records of what was tested for that material/batch.
3) Check signatures/approval and lab/manufacturer details
A solid COA usually includes:
- issuing organization details
- analyst or QA approval fields
- references to internal methods/standards (depending on the supplier)
4) If documentation is “where applicable”
Sometimes documentation is not available for every listing (or may vary by batch). That’s normal in many research supply workflows—what matters is transparent communication about what is available and how to request it.
Need help finding your documentation?
If you contact support, include:
- product name
- order number (if applicable)
- lot/batch number (best)
Reminder: Centurion products are Research Use Only and not for human consumption.