The Importance of Comprehensive Testing: Purity, Amount, Endotoxin, Heavy Metals and Sterility

A purity percentage is only one part of a peptide's analytical profile. Amount, endotoxin, heavy metals and sterility complete the picture. Batch-specific Janoshik reports let researchers verify exactly what they receive — not a generic collective COA.

HPLC purity above 99% is necessary but not sufficient. Endotoxin and sterility data matter for cell-culture work. Heavy-metal screens rule out process contaminants. Amount testing confirms the labelled milligrams in the vial.