THE PURAXIS STANDARD
Every batch earns
its purity claim.
We don't issue a generic COA and call it done. Each batch undergoes individual RP-HPLC analysis, mass-spectrometry identity confirmation, and sequence verification — then we publish the results publicly.
The 4-Stage Verification Protocol
Reversed-Phase HPLC
Each batch is dissolved and run through a reversed-phase high-performance liquid chromatography column. The chromatogram peak area integration measures the peptide fraction against known reference standards. Purity is reported as area percentage.
Standard: USP <621> · Column: C18 · Detection: UV 220nmMass-Spectrometry Identity
After HPLC, the eluent undergoes electrospray ionization mass spectrometry (ESI-MS) or MALDI-TOF. This confirms the molecular weight matches the target peptide within 1 Da tolerance — ruling out sequence errors or substituted amino acids.
Method: ESI-MS or MALDI-TOF · Tolerance: ±1 DaAmino Acid Sequence Verification
Selected batches undergo Edman degradation or tandem MS/MS fragmentation to confirm the exact amino acid sequence in correct N→C terminal order. This step verifies sequence integrity beyond mass alone.
Method: MS/MS fragmentation pattern analysisCOA Publication
Results are compiled into a Certificate of Analysis with batch number, testing date, purity result, and instrument metadata. The COA is published at a unique URL tied to the batch ID and linked via QR code on every product shipment.
Format: PDF · URL: puraxis.com/coa/[batch-id]BATCH COA DATABASE
Public COA Records
Every batch we've sold. Every certificate, publicly accessible.
| Product | Batch ID | Purity | Method | Status | COA |
|---|---|---|---|---|---|
Matrixyl 3000 Serum Palmitoyl Pentapeptide-4 | PX-MTX-240301 | ≥99.3% | RP-HPLC + MS Confirmation | Verified | Download PDF → |
Argireline Complex Acetyl Hexapeptide-3 | PX-ARG-240215 | ≥99.1% | RP-HPLC | Verified | Download PDF → |
GHK-Cu Copper Concentrate Copper Tripeptide-1 | PX-GHK-240318 | ≥99.5% | RP-HPLC + ICP-MS (copper verification) | Verified | Download PDF → |
Snap-8 Ampoule Acetyl Octapeptide-3 | PX-SN8-240222 | ≥99.2% | RP-HPLC + MALDI-TOF | Verified | Download PDF → |
Hydrolyzed Collagen Peptides Hydrolyzed Marine Collagen | PX-COL-240308 | ≥99.0% | RP-HPLC + Nitrogen content (Kjeldahl) | Verified | Download PDF → |
Multi-Peptide Eye Serum Acetyl Hexapeptide-3 | PX-EYE-240325 | ≥99.0% per active | Individual RP-HPLC per peptide | Verified | Download PDF → |
Transparency isn't a feature.
It's the minimum standard.
The cosmetic peptide market has a transparency problem. Generic COAs, undisclosed concentrations, and unlabeled sequences are commonplace. Puraxis exists to fix that — because formulators and serious skincare users deserve to know exactly what they're working with.