How to read a certificate of analysis

What a certificate of analysis is for

A certificate of analysis (CoA) communicates analytical results for an identified sample or batch against stated specifications. WHO’s model CoA includes product or material identity, batch information, specifications and test procedures, results, acceptance criteria, a conclusion and authorised approval of the certificate.

That makes the CoA useful for batch-quality review. It does not by itself prove marketing authorisation, legal import status, GMP certification, supply-chain authenticity or clinical equivalence.

First confirm what was actually tested

Match the name, dosage form or material grade, strength where applicable, package or primary-packaging description, batch number, manufacturer and relevant dates. If a trader or repacker is involved, the document should make the relationship clear. A correct-looking analytical table attached to the wrong batch is not useful evidence for the batch you are reviewing.

If sampling affects interpretation, record the sampling plan or reference. Do not assume that a certificate generated for a raw material, bulk product or another finished-product presentation applies to the item in front of you.

Read specification, method, result and limit together

For each test, identify the specification or acceptance criterion, the referenced method and the actual result. Numerical results should be compared with the stated limits. A result such as “complies” is meaningful only when the test and specification are unambiguous and the reporting format is appropriate to the method.

Subcontracted testing, special test conditions or observations should be identifiable when relevant. If a result was not tested, not applicable or reported by another laboratory, the document should not make those situations look like an ordinary in-house pass.

Check conclusion and authorisation

The certificate should reach an explicit conclusion about conformity with the stated specification and identify the authorised person approving the certificate, with the relevant date. A signature image alone does not resolve whether the issuer was authorised or whether the document was later superseded.

Electronic certificates may use different controls, but the same due-diligence questions remain: who issued the record, which laboratory performed the tests, what batch and specification it covers, and whether the record is current and authentic.

What a CoA does not establish

A passing CoA is not a substitute for an approved product dossier, manufacturing authorisation, GMP inspection outcome, stability programme or lawful destination-market route. It also does not prove that a product offered by an unknown seller is authentic merely because a PDF carries a familiar name.

No Luang Pharma batch CoA is published by this website. If a future transaction requires one, the document must be tied to the exact product, batch, manufacturer and supply chain and reviewed together with the other applicable regulatory and quality evidence.

CoA review checklist

• Exact product or material identity and batch number.
• Manufacturer, laboratory and any repacker or trader relationship.
• Manufacture, expiry or retest dates where applicable.
• Specification and test-method references.
• Acceptance criteria and actual results for every reported test.
• Subcontracted tests or relevant observations identified.
• Conformity conclusion, authorised approval and date.
• Traceable source of the certificate and any verification mechanism.