US-Based Third-Party QA Testing
Lots are sent to independent, US-based third-party laboratories for HPLC purity testing. We maintain a 98% minimum purity standard.
AtoZ Peptides
AboutAtoZ Peptides
Quality research compounds, tested at US-based third-party laboratories, with full transparency
Our Mission
Providing researchers with high-purity, independently verified compounds they can trust.
Full Transparency
We publish the certificate of analysis for tested lots, with the real purity number, the lab that ran it, and the lot it belongs to. Read them yourself.
USA Based
We operate from Arizona with domestic shipping via USPS. Fast delivery, reliable tracking, and local support.
Careful Packaging
Every order is packed with protective materials in discreet, plain packaging. Products arrive safe and secure.
Lab testing
Lab Testing Methodology
Incoming lots go through a multi-step quality assurance process before release.
Lot Quarantine
Incoming product is logged with a unique lot number and quarantined until testing is complete.
Blind Submission
Samples are sent to independent, US-based third-party laboratories for testing.
Analysis & Review
HPLC purity results are reviewed, along with FTIR identity analysis where the lab report includes it. Lots below 98% purity are rejected.
Publish & Release
Approved COAs are published on the product page. The lot is released for sale.
Analytical Methods
Analytical Methods
HPLC Purity Analysis
Reverse-phase High-Performance Liquid Chromatography with UV detection. This is where the purity percentage on our published COAs comes from.
FTIR Identity Analysis
Fourier-transform infrared spectroscopy confirms a compound's identity and composition against a reference standard. It appears on lab reports where the testing lab performs it.
Connect With Us
Connect With Us
All AtoZ Peptides products are sold strictly for research, laboratory, and analytical purposes. They are NOT intended for human or animal consumption. See our Terms of Service for full details.