Endotoxin
Also known as: lipopolysaccharide · LPS · pyrogen
Bacterial cell-wall toxins that can contaminate a preparation; low endotoxin levels are a marker of clean manufacturing.
Endotoxins are lipopolysaccharide molecules from the outer membrane of certain bacteria. They can remain even after the bacteria themselves are gone, and they provoke strong inflammatory responses, making them a critical contaminant to control.
Endotoxin testing (for example by the LAL assay) checks that a preparation is below a defined threshold. Low endotoxin is a marker of clean, controlled manufacturing and is reported for high-grade research material.
RELATED TERMS
Sterility
Freedom from viable micro-organisms; sterility testing confirms a preparation is not contaminated by bacteria or fungi.
Purity
The percentage of a sample that is the intended peptide, as measured by HPLC — the headline quality figure.
Certificate of Analysis (CoA)
A batch-specific lab document reporting a compound’s identity and purity — the primary proof of what is in the vial.
GMP
Good Manufacturing Practice — the quality-system standard governing how materials are produced and controlled.
Educational content, not medical advice. All products supplied for research purposes only — not for human consumption.