Quality & Testing Standards
Every batch third-party tested. Every result documented. Every product traceable.
Minimum purity verified on every peptide via High-Performance Liquid Chromatography.
Every lot ships with a published Certificate of Analysis.
Independent verification by Freedom Diagnostics before shipping.
Reliable Research Peptides.
No Compromises.
Every compound undergoes rigorous third-party verification. We don't cut corners on purity, documentation, or fulfillment speed.
- HPLC + LCMS/MS on every batch
- Published COA with every order
- Independent testing by Freedom Diagnostics (USA)
- Searchable verification codes on every COA
Research-grade peptides. Independently tested. Fully documented.
Testing Methodology
Every peptide lot undergoes rigorous third-party verification before reaching a customer. Two complementary analytical methods confirm both identity and purity.
High-Performance Liquid Chromatography
HPLC with UV detection separates peptide components and quantifies purity as a percentage of total peak area. This is the industry-standard method reflected in the purity figure on every COA.
Mass Spectrometry (LCMS/MS)
Liquid Chromatography coupled with tandem Mass Spectrometry confirms the exact molecular structure by matching mass fragmentation patterns against expected values. This verifies identity.
Freedom Diagnostics
Our testing laboratory of record is Freedom Diagnostics (USA), directed by Principal Chemist Stephen Schmidt. They operate independently of 21 Peptide, providing unbiased analytical verification of every lot.
What's on Every COA
Six data points documented on every certificate
Storage & Handling
All peptides ship as lyophilized powder and should be stored at 2-8°C prior to reconstitution. Storage and handling instructions specific to each compound are documented on individual product pages.
View All Certificates of Analysis
Download HPLC-verified COAs for every peptide in our catalog, or browse individual product pages for chemical specs and purity data.