Certificate of testing vs certificate of analysis: same document, different name.
"Certificate of testing" and "certificate of analysis" turn up on the same kind of report across this market, but only one of the two phrases has a definition in pharmaceutical GMP guidance. Read through one real published AKH batch to see what a certificate actually needs to carry to be checkable, regardless of which name is printed on it.
Two labels circulate on the documents peptide vendors attach to a product page: certificate of analysis and certificate of testing. Buyers researching either term usually want the same answer — is this the document that proves what is in the vial, and how would anyone check it. The honest answer is that only one of the two names has a fixed definition to check against.
This post is written for researchers and laboratory personnel deciding whether a report attached to a research compound is worth anything. It compares the two terms against pharmaceutical GMP guidance, then walks through one certificate of analysis AKH BioLabs has actually published — a real batch, not a specimen — to show what a checkable report looks like field by field.
Key takeaways
- "Certificate of analysis" has a standing definition in pharmaceutical GMP guidance (ICH Q7 §11.4): named batch, release date, each test performed with its results, and the issuing laboratory's name, address and signature.
- "Certificate of testing" carries no equivalent definition in that guidance. In practice it is used as a synonym for certificate of analysis, and sometimes for a shorter document that omits one or more of the elements above.
- The name printed on a document is not the useful signal. The useful signal is whether the required elements are actually present and whether the batch number on the document matches the batch on the vial.
- A real AKH batch — BPC-157, batch 26149, tested by the Brown Institute of Biomolecular Research on 2026-07-28 — carries every element ICH Q7 lists: named batch, dated result, named laboratory, a lookup reference, and the measured result stated verbatim.
- A report missing a batch number, a test date, or a named laboratory is not a lesser version of a certificate of analysis. Under the same guidance, it is not describing anything a buyer can check.
One of the two names has a definition
Certificate of analysis is not a vendor's invention. It is a defined document in pharmaceutical Good Manufacturing Practice guidance — specifically ICH Q7, the FDA's guidance for industry covering active pharmaceutical ingredients, section 11.4. That section states plainly what such a certificate is issued for and what it has to carry: "Information on the name of the intermediate or API including, where appropriate, its grade, the batch number, and the date of release should be provided on the certificate of analysis," that "the certificate should list each test performed in accordance with compendial or customer requirements, including the acceptance limits, and the numerical results obtained," and that certificates "should be dated and signed by authorized personnel of the quality unit(s) and should show the name, address, and telephone number of the original manufacturer."
"Certificate of testing" does not appear anywhere in that section, or elsewhere in the guidance, as a distinct document with its own requirements. That absence does not mean the phrase is meaningless — it is used constantly across this market — only that it is not a term with a fixed technical content the way certificate of analysis is. In practice it functions as a synonym, and vendors reach for it interchangeably with certificate of analysis on product pages and in marketing copy.
The practical consequence is narrow but useful: a document titled "certificate of testing" is not automatically a lesser or informal version of a certificate of analysis, and a document titled "certificate of analysis" is not automatically complete just because it uses the recognised name. Neither title does the checking. The content underneath it does.
Reading one actual AKH batch
The elements ICH Q7 lists are easiest to see against a real report rather than a description of one. This is a genuine certificate AKH BioLabs has published, not a specimen built to illustrate the point: BPC-157, batch 26149, tested by the Brown Institute of Biomolecular Research on 2026-07-28. Every field below is taken from that report.
| Field | Value on this batch |
|---|---|
| Product | BPC-157 |
| Batch | 26149 |
| Test date | 2026-07-28 |
| Laboratory | Brown Institute of Biomolecular Research |
| Report reference | #1812445 |
| Result | BPC-157: 10mg | Purity: 99.66% |
Named batch
Batch 26149 identifies one synthesis run. A certificate naming no batch cannot be matched to any specific vial, which is the first thing ICH Q7 requires it to carry.
Dated result
The test date, 2026-07-28, places the measurement in time. A purity figure describes the material on the day it was analysed, not indefinitely afterwards.
Named laboratory
Brown Institute of Biomolecular Research is identified by name, satisfying the requirement that a certificate show who performed the analysis rather than leaving it anonymous.
Reference for lookup
Report #1812445 is the laboratory's own reference for this analysis — the identifier that makes checking the certificate against its source possible in principle.
Result stated, not summarised
The report reads "BPC-157: 10mg | Purity: 99.66%" — the measured result itself, not a vendor's paraphrase of it.
What to check, whatever the document is called
The ICH Q7 elements translate directly into a short list a buyer can actually check on any report, regardless of whether it is titled certificate of analysis or certificate of testing. None of these checks depends on which name is printed at the top.
- 01
A batch number is present and matches the vial
If the vial carries no batch marking, or a different one than the certificate, the certificate is describing different material, whatever the rest of the document says.
- 02
The report is dated
An undated result cannot be placed relative to when the batch was made or how long ago it was tested.
- 03
A specific laboratory is named
"Independently tested" with no laboratory identified names nobody. The laboratory's name is what makes the next check possible at all.
- 04
The result is stated, not just a pass or fail
A numeric or verbatim result (a purity percentage, an identity confirmation) is checkable against the method that produced it. A bare "passed testing" statement is not.
- 05
A report or task reference exists
This is the identifier that, where the laboratory offers a lookup route, connects the document back to the laboratory's own record rather than a vendor's copy of it.
Why the naming gets loose
The overlap between the two phrases is not evidence of anything sinister on its own. Vendors write product copy quickly, translate it from other languages, or simply pick up whichever phrase a competitor used first, and "certificate of testing" reads naturally as a plain-English gloss on "certificate of analysis" even where no formal distinction was intended. Most of the time the two labels sit on documents that are functionally the same thing.
The risk is not the label. It is that a looser phrase invites a looser document — one that keeps the appearance of a certificate while quietly dropping a batch number, a date, or the laboratory's name. Nothing in either phrase guarantees the underlying content either way, which is exactly why the checklist above checks the content and ignores the title.
Common questions.
- What is a COA document?
A certificate of analysis is a laboratory report tying one tested sample from one named batch to a set of measured results, issued on a stated date by a named laboratory. Pharmaceutical GMP guidance (ICH Q7 §11.4) sets out what it should carry: the batch number, the date of release, each test performed with its results, and the issuing laboratory's name, address and signature.
- Is a certificate of testing the same as a certificate of analysis?
Usually, in practice — the two phrases are commonly used as synonyms across this market. "Certificate of testing" has no separate definition in pharmaceutical GMP guidance the way certificate of analysis does, so nothing about the name itself guarantees what the document contains. What determines whether either one is worth anything is the content: a named batch, a test date, a named laboratory and a stated result, not the title at the top of the page.
- How do you verify a peptide COA?
Take the batch number, laboratory name and report or task reference from the certificate and check them independently rather than accepting a vendor's image of the document. Confirm the batch on the certificate matches the batch on the vial, confirm the named laboratory is a genuine third party, and where the laboratory operates a lookup route, use the report reference to find the original record rather than a copy of it.
- What does a certificate of analysis have to include?
Under ICH Q7 §11.4, a certificate of analysis should carry the name of the material and its batch number, the date of release, each test performed with its acceptance limits and numerical results, and be dated and signed by the issuing laboratory with its name, address and telephone number stated. A document missing the batch number, the test date or the laboratory's identity is not meeting that standard, whatever it is titled.