Verified — all release criteria met
releasedCurrent lot
Certificate of analysis
P21
Lot CP-P21-2607A · 5 mg
99.37 %
HPLC purity
Spec ≥ 98.0 %
83.2 %
Net peptide content
By amino acid analysis
< 0.43
Endotoxin (EU/mg)
Spec < 5.0 EU/mg
Provenance
- Testing laboratory
- Janoshik Analytical
- Accreditation
- ISO/IEC 17025:2017
- Country of synthesis
- United States
- Manufactured
- Jul 7, 2026
- Release tested
- Jul 16, 2026 (2 months ago)
- Retest date
- Jul 6, 2028
- Theoretical mass
- 852.00 Da
- Observed mass (LC-MS)
- 852.09 Da (Δ 0.09 Da)
Assay results
Every line the release panel ran for this lot, with the method, the acceptance criterion and the measured value — not a pass mark alone.
| Method | Parameter | Specification | Result | |
|---|---|---|---|---|
| RP-HPLC (UV 214 nm) | Purity (area %) | ≥ 98.0 % | 99.37 % | Pass |
| LC-MS (ESI+) | Identity — observed mass | 852.00 ± 1.0 Da | 852.09 Da | Pass |
| Amino acid analysis | Net peptide content | ≥ 80.0 % | 83.2 % | Pass |
| Karl Fischer | Water content | ≤ 8.0 % | 3.62 % | Pass |
| Ion chromatography | Residual TFA | ≤ 1.0 % | 0.22 % | Pass |
| LAL kinetic chromogenic | Bacterial endotoxin | < 5.0 EU/mg | < 0.43 EU/mg | Pass |
| USP <71> membrane filtration | Sterility | No growth | No growth | Pass |
| Visual / USP <790> | Appearance | White to off-white cake, free of visible particulates | Conforms | Pass |
Handling for this lot
- Appearance
- White lyophilised powder
- Storage
- -20 °C, desiccated and protected from light
- Reconstitution
- As with Dihexa, prepare a DMSO stock and dilute. Report final DMSO concentration in your methods.
Other lots of P21
Compare batch to batch. Consistency across lots is a stronger signal than any single certificate.
Research use only. This certificate describes material supplied strictly for laboratory research. It is not a drug, food, cosmetic or medical device, has not been evaluated by the FDA, and is not intended for human or veterinary administration of any kind.