Quality and Testing
Lot-specific results from an independent laboratory, published on each certificate of analysis.
Independent laboratory testing of each lot for purity, identity and net peptide content, with a public certificate of analysis library.
What every certificate reports
Purity
The share of the sample that is the target peptide, reported for each lot.
Identity
Confirms the compound in the vial is what the label says it is.
Net peptide content
How much peptide is in the vial compared with the label amount.
Each published lot meets at least 99.16% purity by HPLC.
How a certificate reaches this page
- 1
Independent testing
A third-party laboratory tests each lot and reports purity, identity and net peptide content.
- 2
Certificate published
The certificate for that lot is added to the COA library and linked from its product page.
- 3
You match the lot
Search the COA library by lot number and compare it with your vial label before you rely on the results.
What a certificate looks like
Every certificate in the library shows:
- Product name and lot number
- Test date and testing laboratory
- Purity, identity and net peptide content results
- A SHA-256 fingerprint of the certificate file
Find the certificate for your lot
Enter the lot number printed on your vial label.
Our approach
Published lots are tested by an independent third-party laboratory, Freedom Diagnostics. Certificates for published lots are in the COA library.
What we test
- Purity by HPLC, reported for each lot as a percentage.
- Identity by LC-MS, confirming the compound is what the label says it is.
- Net content, reported in milligrams per vial.
- Results are lot-specific. Each certificate applies to the lot named on it and states exactly what was measured.
- Each certificate file has a SHA-256 fingerprint on its library card, so you can check that a download has not changed.
- Testing laboratory: Freedom Diagnostics.
Reading a COA
Each certificate lists the product, lot number, test date, laboratory, method and result. Match the lot number on your vial label to its certificate before you rely on the results. The latest lot is shown on the product page; earlier lots remain in the COA library.
Traceability
Lot numbers link your vial to its certificate. Keep the lot number with your records, and enter it in the lot lookup on this page to open the matching certificate.
What our testing does not cover
Results describe the tested lot only. They are not a statement of safety or fitness for any use, and we do not make claims about assays that are not listed on the certificate. All materials are for in-vitro laboratory research only.
Storage and stability
Store materials as directed on the product page, typically in a cool, dry place away from light, and follow the guidance on the certificate. Once a vial is opened, handling and storage are the researcher's responsibility.
Report a concern
If a result does not match what you received, contact us with the lot number and we will review it against our testing records.
Research compounds, documented lot by lot.
Browse the catalog, then check the certificate of analysis for the lot in your hands.