Certificate of Analysis (CoA)
Peptix publishes third-party Certificates of Analysis (COAs) for the lots listed below. Testing is performed by Freedom Diagnostics, an independent laboratory. Each certificate applies only to the lot number printed on it. All Peptix products are for in vitro laboratory research use only. Not for human or animal use.
Current lots
BPC-157 10 mg
(also BPC-157 10 mg, Pack of 5)
- Lab
- Freedom Diagnostics
- Report date
- July 8, 2026
- Method
- HPLC-UV (purity) and LC-MS (identity)
- Result
- Purity 99.26%; identity BPC-157
- Measured net content per COA
- 12.71 mg (labeled 10 mg)
TB-500 10 mg
(also TB-500 10 mg, Pack of 5)
- Lab
- Freedom Diagnostics
- Report date
- July 8, 2026
- Method
- HPLC-UV (purity) and LC-MS (identity)
- Result
- Purity 99.79%; identity thymosin beta-4
- Measured net content per COA
- 12.15 mg (labeled 10 mg)
BPC-157 / TB-500 20 mg
(also BPC-157 / TB-500 20 mg, Pack of 5)
- Lab
- Freedom Diagnostics
- Report date
- July 8, 2026
- Method
- HPLC-UV (purity) and LC-MS (identity)
- Result
- Purity 99.15%; identity BPC-157 and thymosin beta-4
- Measured net content per COA
- 13.68 mg BPC-157 + 11.17 mg thymosin beta-4 (labeled 10 mg + 10 mg)
Bacteriostatic Water 10 mL
(also Bacteriostatic Water 10 mL, Pack of 5)
- Lab
- Freedom Diagnostics
- Report date
- September 27, 2026
- Method
- HPLC-UV (purity) and LC-MS (identity)
- Result
- 0.95% benzyl alcohol (per COA)
- Measured net content per COA
- See COA
Retatrutide 20 mg
Retatrutide 20 mg — Lot RT20-20260728-01 — Certificate of Analysis available on request: support@peptix.io
Verify any report directly with the lab on the Freedom Diagnostics COA lookup using its search code.
Pack rows: for 5-packs, the lot number is shown on your certificate. Lots change over time. If your vial shows a lot number that isn't listed here, contact us before use in your research.
How to match your vial's lot number to its COA
- Find the lot number printed on your vial label or box (for example, BC-20260521-01).
- Find the same lot ID in the list above.
- Open the certificate and check that the lot number printed on it is identical, character for character.
- If the lot on your vial isn't listed, or doesn't match, contact Peptix support with your order number and the lot number before using the material.
How to read a COA
- Client, accession number and search code: identify the submission at the testing lab.
- Received / Reported: when the lab received the sample and when it issued the report.
- Lot: the batch the sample came from. A certificate applies only to that lot.
- Purity (HPLC-UV): the share of the main peak in the chromatogram measured by high-performance liquid chromatography with UV detection, reported as a percentage.
- Identity (LC-MS): liquid chromatography with mass spectrometry, used to check that the measured mass matches the expected compound. The result line names what was identified.
- Net content: the amount the lab measured in the tested vial, as printed on the certificate. It can differ from the labeled amount stated on the product label.
- Chromatogram and mass spectrum: the raw traces behind the results.
A certificate reports results for the sample tested. It is not a guarantee for other lots.
For in vitro laboratory research use only. Not for human or animal use. Questions about a lot? Contact us. · Browse research peptides
