Certificate of Analysis Checklist: Is the Document Complete?

A certificate of analysis, or COA, records analytical results for identified material. A polished layout or an impressive percentage is not enough: the first question is whether the document can be connected to the sample being discussed.

This checklist focuses on document completeness rather than interpreting chromatograms. It uses ICH Q7 as a reference for good documentation principles. Q7 concerns active pharmaceutical ingredients and their intermediates; citing it here does not mean any material or supplier on this site is certified under that guideline.

1. Match the identifiers before reading the result

Compare the material name and lot or batch identifier on the report with the label and receiving records. A product name alone may cover several batches. If the laboratory uses a separate sample number, ask for the record that connects it to the relevant lot; do not assume the numbers are interchangeable.

ICH Q7 section 11.41 identifies the material name, batch number and release date as certificate information. A sample description supplied to a laboratory still needs a documented link to the material received.

2. Check who issued the document and when

Look for the issuing organization, report identifier, dates and authorization information. Distinguish the analysis date from a release, retest or expiry date; they answer different questions. A recent upload does not necessarily mean a recent analysis.

If authenticity is uncertain, contact the issuer using independently located contact information. Where an issuer offers a verification service, compare the original record with the supplied copy. A QR code by itself is not proof of authenticity.

3. Read the test, units and acceptance limits together

Record what was measured, how it was reported and what acceptance criterion was applied. A percentage, a concentration and an amount in milligrams are not interchangeable results. Ask for clarification when a reporting basis or method is missing rather than filling the gap yourself.

Section 11.42 of Q7 calls for the tests performed, acceptance limits and numerical results where applicable. A lone “pass” is less informative than the result and the criterion behind that decision.

4. Keep missing evidence visible

• Different batch: request the report or documented mapping for the relevant lot.
• Unclear number: request the unit and reporting basis.
• Uncertain copy: ask the issuer to confirm the report.
• Missing test: record it as untested or unknown, not as passed.

What this checklist cannot establish

A complete document does not prove every container was individually tested, that later handling preserved the material, or that unreported hazards were assessed. Analytical documentation is not evidence of therapeutic benefit, authorization for human use or universal safety.

Next, learn why purity and quantity need separate interpretation, or use the batch-record checklist to connect a report to receiving records.

Source and scope

ICH Q7: Good Manufacturing Practice Guide for Active Pharmaceutical Ingredients, sections 11.4 and 17.2. This is general documentation education, not a legal compliance assessment or medical advice.