Description_x000D_ Packaging_x000D_ 50, 100, 200 tablets in glass bottle_x000D_ Application_x000D_ Chromogenic substrate for use with alkaline and acid phosphatase ELISA procedures. Produces a soluble end product that is yellow in color and can be read spectrophotometrically at 405 nm. The pNPP reaction may be stopped with 3 N NaOH and read at 405 nm._x000D_ Other Notes_x000D_ Substrate for the determination of acid and alkaline phosphatases.