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 sputum reagents in bacterial endotoxin tests, interference tests and various positive controls, and can be used for quantitative methods. It is installed in a vial and can be dissolved and used without endotoxin water, which is convenient and quick.