Histochemical substrate commonly used in conjunction with Fast Red TR for immunohistology, immunoblotting and dot blot applications. Insoluble. Reaction Condition: Stocks: 10 mg/ml NABP in H20. Add 0.2 ml of this to 9.8 ml 0.1 M Tris-Cl, pH 8.5. Dissolve 10 mg Faast Red TR to the solution before use.