ABTS (2,2' -Azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid), diammonium salt) is a very sensitive chromogenic peroxidase substrate widely used for ELISA applications. The substrate yields a water-soluble green colored product.Pale yellow solid soluble in waterStore desiccated at 4°C and protect from lightC18H24N6O6S4MW: 549[30931-67-0]