BCIP Pink (6-Chloro-3-indoxyl phosphate, p-toluidine salt) is a derivative of BCIP chromogenic phosphatase substrate. While BCIP yields a blue precipitating product, BCIP Pink produces a pink colored (λmax 540 nm) precipitate. White solid soluble in water Store at 4°C and protect from light C15H17ClN2O4P MW: 354.7 [159954-33-3]