Key takeaways
What should you check before reading a result?
The material or sample name, lot number, issuing laboratory, report date, and COA number should form one consistent record. Confirm these identifiers before reading a purity percentage or any other result.
Compare those identifiers with the product or lot reference shown on the site. A document for a similarly named material or a different lot is not interchangeable with the record you intended to review.
- Material or sample name
- Lot or batch number
- Issuing laboratory or source
- Report date and COA number
Do identity and purity answer the same question?
Identity and purity answer different analytical questions. An identity-related result addresses whether the measured material is consistent with the named sample under the stated method. A purity result describes the reported chromatographic composition under its stated method.
A high purity percentage does not independently establish identity. An identity result does not replace a purity measurement, content result, endotoxin field, heavy-metals field, or any other separate analysis.
How should you read a method and result?
A result should stay attached to the method printed beside it. RP-HPLC, MALDI-MS, HPLC quantitation, endotoxin methods, and elemental or heavy-metals methods measure different things. A method name alone is not a result, and a result without its method loses important context.
Chromatograms and spectra can provide supporting analytical detail, but they still belong to the named sample and lot. They should not be carried over to another record.
Which additional fields can appear on a COA?
Some posted records include endotoxin, heavy-metals, pH, water-content, or other analytical fields. Read each only when it appears on the relevant COA, with the unit and method shown by the issuer.
Endotoxin reporting is not a sterility test. A heavy-metals result is not a complete contaminant screen. Neither field should be implied for a material or lot whose posted record does not show it.
How can you check a public laboratory record?
When a laboratory provides a public verification number, use it to open or search for the matching lab-hosted record. Compare the material, lot, date, and reported fields with the copy posted on the CellSyntax report page.
A matching public lab record confirms that the laboratory hosts a record with those identifiers. It should not be described as proof of packaging, delivery, chain of custody, or suitability for a particular use unless separate evidence establishes those points.
What are the limits of a COA?
A COA is not use guidance, a medical claim, or a guarantee of suitability. It does not make one result universal across products, sizes, or future lots.
If an identifier, method, unit, or result is missing or unclear, leave the question unresolved. The narrow answer is more useful than filling a gap with marketing language.
Frequently asked questions
How do identity and purity differ?
Identity and purity answer different analytical questions. An identity-related result addresses whether the measured material is consistent with the named sample under the stated method. A purity result describes the reported chromatographic composition under its stated method.
Does a high purity percentage establish identity?
A high purity percentage does not independently establish identity.
What should happen when a field is unclear?
If an identifier, method, unit, or result is missing or unclear, leave the question unresolved.
References
Reference list updated: 4 November 2026.
These references explain the analytical and documentation concepts used in this article. They do not certify any CellSyntax material or lot.
- FDA · Q6A Specifications and Analytical Procedures ↗Referenced for the general distinction between identification tests, analytical procedures, and acceptance criteria. CellSyntax research materials are not represented as approved drug substances or products.
- NIST · Theoretical Mass Spectrometry ↗Referenced for the limited analytical description of mass spectrometry as separation based on mass and charge.