Our Standards
Every peptide we supply is independently verified for identity, purity, and potency before it reaches you.
RESEARCH USE ONLY. All products sold by Fragment Labs are intended strictly for in vitro laboratory research. Not for human or veterinary use.
Why It Matters
Third-Party Tested. Every Batch.
We do not rely on supplier certificates alone. Every product batch is independently tested by accredited third-party laboratories before it is listed for sale. Results are verifiable on each product page via the Certificate of Analysis (COA).
FL-QA-001 // BATCH VERIFIEDPurity & Identity
≥ 99% Purity
Verified by HPLC. We do not stock products that fall below this threshold.
Identity Confirmed
Mass Spectrometry (MS) and NMR confirm every peptide matches its stated sequence exactly.
Microbial Safety
All batches screened for microbial contamination and bacterial endotoxins to research-grade sterility standards.
Heavy Metals
ICP-MS analysis screens for lead, mercury, arsenic and cadmium below ICH Q3D limits.
Testing Matrix
| Test | Method | Standard |
|---|---|---|
| Purity | HPLC | ≥ 99% |
| Identity | MS / NMR | Sequence match |
| Endotoxins | LAL / rFC assay | < 1 EU/mg |
| Microbial | USP <61> | Pass |
| Heavy Metals | ICP-MS | ICH Q3D limits |
| Moisture | Karl Fischer | < 5% |
Storage & Cold Chain
Lyophilised Storage Protocol
All lyophilised peptides are stored at −20°C until dispatch. Cold-pack insulation is included with every order.
Store lyophilised peptides at −20°C. Once reconstituted, store at 4°C and use within 4 weeks.