Quality & testing
Peptide purity claims are only worth the paperwork behind them. Here is exactly what happens to a lot before it becomes something you can order.
1. Identity by mass spectrometry
Every incoming lot is confirmed against its expected molecular weight before anything is accepted into stock.
2. Purity by HPLC
Reverse-phase HPLC quantifies purity. We publish the actual figure, not a rounded marketing number, and reject anything below 98%.
3. Stability & appearance
Lyophilised cake appearance, moisture and solubility are checked, then vials are held at 2–8°C in a monitored cold room.
4. Documentation
Each lot gets a certificate of analysis tied to the lot number printed on your vial and shown on your invoice.
Reading your certificate of analysis
A COA should name the compound, the lot, the test date, the testing laboratory, and show the chromatogram. If any of those are missing, the document is decoration. Ours include all five — email us your lot number and we will send it back the same working day.
Request a COA
Our standards at a glance
- ≥ 99%
- Typical HPLC purity
- 100%
- Lots with a COA
- 2–8°C
- Monitored cold storage
- < 24h
- COA request turnaround