The Endochrome-K™ LAL reagents for the kinetic chromogenic determination of bacterial endotoxins facilitate testing due to their ease of use and unique stability. The maximum sensitivity of the reagent is 0.001 U/ml. Endochrome-K™ provides linearity and a high level of interference resistance. LAL reagents are certified in accordance with regulatory requirements for testing bacterial endotoxins by pharmacopoeial method D, including licenses from the U.S. Food and Drug Administration.