COA vs SDS vs third-party test report

Three documents, three questions

Buyers often ask for “the COA” when they need a different document. Three documents come up most often when research materials are purchased, and each answers its own question. A certificate of analysis (COA) reports test results for one identified lot against a specification. A safety data sheet (SDS) describes the hazards of a substance and how to handle, store and dispose of it. A third-party test report records what an outside laboratory found in one sample submitted to it.

What a COA should identify

A COA is useful only when it ties results to a lot. Check that it names the product, the lot or batch number, each test with its method, specification and result, the date of analysis and the organization that issued it. A COA without a lot number cannot be matched to the goods you receive.

• Product name and catalog code.
• Lot or batch number.
• Test, method, specification and result for each line.
• Date of analysis and issuing organization.

What an SDS is for

An SDS supports work with a material in the laboratory. Under the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), which many jurisdictions apply, it follows a 16-section structure that includes hazard identification, handling and storage, exposure controls, stability and reactivity, disposal and transport. Your institution’s safety office may require one before a material arrives.

An SDS is written for a substance rather than a lot and contains no purity result, so it cannot replace a COA, and a COA cannot replace an SDS. If your institution requires an SDS, name it in your request, ask whether one is available for the material and keep the answer with your quote.

Where third-party test reports fit

In research-peptide purchasing, a third-party test report is often called a COA. The difference matters: a test report describes the sample the laboratory received, while a COA states results for a lot. The reports in NorthVerity’s report library are third-party test reports. BPC 157 10 mg report BC10-20260908S6179 from TJQXGD names lot 5828704; ARA-290 10 mg report COA-1AvcSX-K-0F from PRISTINBIO names lot 20260905, even though its number begins with “COA”. Judge a document by what it covers, not by its title.

NorthVerity states that this report was made on the batch it currently supplies. A report covers only the sample it tested, so ask for the lot number of your goods with your quote.

Each report covers only the sample and batch printed on it. Verify it on the issuer’s website and check that the lot number matches the goods you receive.

The issuer (TJQXGD) states that the data come from a third-party partner laboratory, that neither it nor the laboratory holds CMA/CNAS accreditation, and that this document has no legal certification validity. The issuer (PRISTINBIO) states that the analysis is for information only and applies to the sample provided.

Request each document by name

Name every document you need instead of asking for “the paperwork”. Ask for the documents for the exact lot in your quote. A report describes only the batch it tested, so check that its lot number matches the lot you receive.

A documentation request for BPC 157 10 mg (catalog code BC10) might list:

• Current-lot COA naming the lot in the quote.
• SDS for the material, if your institution requires one.
• The third-party test report for that lot and the issuer’s online record.
• Storage information for the lot.