The PYXAX Standard
The PYXAX Standard is the documented process behind every compound we ship. Nothing on this site is a marketing claim without a corresponding record. This page explains exactly what “verified” means here.
What We Test — And What We Don’t
The second column is the one worth reading. Most suppliers publish only the first.
- Purity by HPLC (≥99% specification)
- Potency against label claim
- Molecular identity by LC-MS
- Lot-specific COA — published before dispatch
- Sterility of the final sealed vial — this requires 503B compounding infrastructure that PYXAX does not operate. We say this openly.
- Endotoxin and heavy-metals screening — not part of our current per-batch panel. We publish what we test, and nothing we don’t.
Launch-batch compounds are verified by Krause Analytical (accredited US laboratory). Ongoing production lots are tested by accredited third-party laboratories, and every batch COA names the laboratory that tested that specific batch.
Our Testing Partners
Every lab we use is independent — no vendor affiliation, no in-house testing. Results are what they are.
Krause Analytical — launch batches
Accredited US analytical laboratory. HPLC purity and LC-MS identity confirmation on our first production lots.
Additional accredited laboratories
As production scales, further batches may be tested by other accredited independent laboratories. Whichever laboratory tests a batch is named on that batch’s Certificate of Analysis — we name the lab that did the work, not a lab we intend to use.
≥99% Purity, Confirmed Potency
All lyophilized compounds meet a minimum of 99% HPLC purity. Potency is confirmed within 80–120% of label claim in line with USP standards. If a batch does not meet specification, it does not ship.
Lot-Specific COAs
A representative COA is not good enough. The Certificate of Analysis in our COA Library documents the exact batch you receive — matched to the batch number printed on your vial — including purity by HPLC, potency, and identity by LC-MS.
Full Batch Traceability
Each dispatched vial carries its batch identifier. That identifier matches the lot-specific COA published in the COA Library, so the physical vial can be checked against its analytical record.
What We Don’t Claim
PYXAX is a research chemical supplier and we describe ourselves accurately. We make no “pharmaceutical grade” claims and no cGMP claims. We are not a compounding pharmacy (503A) or an outsourcing facility (503B). Any supplier using those terms without a named facility and certification number is worth a second look.
Compliance First
PYXAX supplies compounds strictly for in-vitro and preclinical laboratory research, sold only to qualified researchers and institutions. Researcher confirmation is logged at checkout. See our RUO Disclaimer and Terms of Service for full detail.