Lab-tested guides on peptide quality, COA interpretation, lyophilization, storage, and the science behind what we ship. Compliant, accurate, written by people who handle these compounds every day.
A complete researcher's guide to the analytical evidence behind every peptide vial — identity, purity, sterility, endotoxin, stability — and how to spot a weak COA in seconds.
How the compendial sterility test works under USP <71> — and why a sample can pass it and still fail endotoxin testing.
The biology behind one of analytical chemistry's most unlikely test methods — and why endotoxin testing matters even when steri...
Why LC-MS is the analytical step that closes the gap left by purity measurements — and how to read a peptide mass spectrum.
How the standard analytical method for peptide purity actually works — and why the chromatogram tells a richer story than the h...
Endotoxin and sterility are different tests measuring different risks. Both can wreck a cell-based assay long before purity doe...
A 99% pure vial can still contain far less than the labeled mass of actual peptide. Net peptide content is the number that tell...
HPLC measures purity. Mass spec confirms identity. Together they answer two different questions every researcher should care ab...
Every batch is tested for purity, identity, sterility, endotoxins, and heavy metals. Every COA is published before you buy.
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