Endotoxin (CSE) The main ingredient is endotoxin of Escherichia coli, and its potency is calibrated against the national standard of bacterial endotoxin. It is used for sensitivity review of horseshoe crab reagents in bacterial endotoxin tests, interference tests and various positive controls, and can be used for quantitative methods. It is installed in an ampoule, which is convenient and quick to be dissolved without adding water.