A certificate of analysis (COA) is a lab’s report on a specific sample: what was tested, how, and what the results were. In the research peptide market it is also the document most often faked. This guide walks through each section of a COA, what the numbers mean, the warning signs of a forged or reused report, and how to confirm a report with the lab that issued it.
The short version
- A COA only means something if it matches your batch: same compound, same batch or lot number.
- It should be issued to the company selling it to you. A real report with someone else’s name on it is not their test.
- Look for identity and purity, not purity alone.
- Check that the lab is independent and ISO/IEC 17025 accredited.
- Most important: verify the report on the lab’s own website, using a QR code or access code. A PDF on a seller’s site proves nothing by itself.
The parts of a COA
1. Laboratory and client
The header should name the testing laboratory, its address and its accreditation, and the client the report was issued for. If the “lab” is the seller itself, it is a marketing document, not an independent test.
Check the client name carefully. A common trick is to show a genuine report that was issued to a different company, often the manufacturer or another vendor, and present it as the seller’s own testing. The report can be completely real and still say nothing about the product you are buying. The client on the report should match the company whose name is on your vial and your receipt.
2. Sample details
Compound name, labeled amount (for example 10 mg), batch or lot number, the date the sample was received and the date results were reported. The batch number is the field that ties the report to a physical vial. A report with no batch number cannot be matched to anything.
3. Purity (HPLC)
High-performance liquid chromatography separates a sample into its components. Purity is reported as the main peak’s share of the total, for example 99.2%. Above 98% is common for well-made research peptides. Purity tells you how clean the sample is, not what it is.
4. Identity
Identity confirms the main compound is the one on the label. Labs establish it by mass spectrometry (matching molecular weight) or by matching the HPLC retention time to a reference standard. A report that shows high purity but no identity result leaves open the question of what that pure compound actually is.
5. Quantity (net content)
How much compound is actually in the vial compared with the label claim. A “10 mg” vial measuring 9.6 mg is normal variation. One measuring 6 mg is a problem, whatever its purity.
6. Safety panels
More complete reports add endotoxin testing, sterility or microbial testing, and heavy metals (lead, arsenic, mercury, cadmium). These are not on every COA, so check which tests a report includes before comparing it with another.
7. Signatures and method details
A real report names the analytical methods used and is signed by the lab’s analyst or director. Missing methods or signatures are a red flag.
How to read the HPLC chromatogram
Most COAs include a chromatogram: a line graph with time on the horizontal axis and detector signal on the vertical axis. Each peak is a component of the sample. You want one tall, sharp main peak with only small bumps around it. Several large peaks mean significant impurities, whatever the headline purity number says.
Red flags of a forged or reused COA
- A genuine report issued to a different company than the one selling the product
- No batch or lot number, or the same batch number on every product
- The same report reused across different compounds, amounts or dates
- A lab logo with no way to verify the report on the lab’s own site
- Report dates that come before the product was made, or are years old
- Perfectly round results (exactly 99.00%) on every product
- Edited-looking text, mismatched fonts or a blurry, cropped screenshot instead of a full document
- A seller who will not say which lab tested the product
How to verify a COA with the lab
- Find the verification route on the report or vial: a QR code, an access code or a report number.
- Open it on the testing lab’s own website, not through a link that only goes to the seller’s site.
- Confirm the compound, batch number, date and results on the lab’s page match the report you were given and the vial in your hand.
- Check who the report was issued to. The client name on the lab’s page should be the company you bought from.
- If a seller cannot give you a way to verify with the lab, treat the report as unverified.
How Rogue Compounds COAs work
Every Rogue Compounds report is issued by an independent ISO/IEC 17025 accredited U.S. laboratory is issued in the name of Rogue Compounds LLC, and carries a batch number. You can check a report three ways, and they should all match:
- Product page: the COA for the batch currently shipping.
- COA Library: every current report, with past batches kept on file. Each card has a “Verify with the lab” button.
- Your vial: the label’s batch number and QR code open the report directly on the testing lab’s website, where we cannot edit it.
Reports on our current batches cover purity and quantity, with identity confirmed on our newer reports. New batches are tested on an expanded panel of eight or more tests.
References
- International Organization for Standardization. ISO/IEC 17025: General requirements for the competence of testing and calibration laboratories.
Rogue Compounds products are sold for laboratory research use only. They are not for human or veterinary use.