Research library
Reference material on certificates, analytical methods and handling. Written to be useful whether or not you buy from us — a researcher who knows how to audit a certificate is a researcher we would rather have as a customer, because they can tell the difference.
- Quality9 min read· Updated Jul 14, 2026
How to Read a Peptide Certificate of Analysis
A line-by-line guide to reading a peptide COA: what HPLC purity actually measures, why net peptide content matters more, and the four ways a certificate can be technically true and still useless.
Read the guide - Quality7 min read· Updated Jun 28, 2026
HPLC vs Mass Spectrometry: Why Peptide Testing Needs Both
HPLC measures how much of one thing you have. Mass spec measures what that thing weighs. Neither answers the identity question alone — here is what each catches and what each misses.
Read the guide - Handling8 min read· Updated Jul 2, 2026
Peptide Reconstitution and Storage: A Practical Reference
Diluent choice, why you should never shake a vial, how long reconstituted peptide really lasts, and the freeze-thaw mistake that quietly costs more potency than poor synthesis.
Read the guide - Methods6 min read· Updated May 30, 2026
Endotoxin and Sterility Testing: What the Numbers Mean
Why endotoxin is a separate problem from sterility, what EU/mg means in practice, and why a peptide destined for cell culture needs both tests rather than either.
Read the guide - Compliance5 min read· Updated Jul 20, 2026
Research Use Only: What the Designation Actually Requires
What 'for research use only' means in practice, why a chemical supplier is not a compounding pharmacy, and what responsibilities the designation places on the purchaser.
Read the guide