Education
Red flags in supplier-provided Certificates of Analysis.
Supplier-uploaded CoAs are a starting point, not a conclusion. The most common documentation risks are reuse, mismatch, missing metadata and stale dates. PurityLedger surfaces these as reviewable signals rather than hiding them.
Reuse and recycling
- • Same certificate number appears against unrelated batch numbers
- • Same chromatogram image is reused across different test dates
- • Document fingerprints are identical when they should differ
- • Issuing lab is named but cannot be reconciled with the report header
Mismatches
- • Batch number on the certificate does not match the supplier batch
- • Compound label on the chromatogram differs from the certificate header
- • Method named on the cover does not match the reported scope
- • Sample receipt date is later than the test date
Missing metadata
- • No test date or no review/expiry window
- • No analytical method named
- • No laboratory identifier or signatory
- • No document fingerprint or revision history
Stale or unresolved records
- • Test date is far outside the supplier’s stated review window
- • Disputes are open and unresolved
- • Retests have been requested but not delivered
- • Original record was superseded without a clear audit trail
Important limitation: This record does not certify safety, legality, efficacy, approval, or suitability for human/veterinary use.
PurityLedger provides documentation review, batch record hosting, CoA verification tools and analytical testing coordination only. PurityLedger does not certify any product as safe, effective, legal, approved, or suitable for human or veterinary use. Testing records are batch-specific and do not constitute medical advice, regulatory approval, or endorsement of any supplier or product. Clients and users are responsible for compliance with applicable laws in their jurisdiction.