Indolyl Phosphate Disodium Salt (5 g) is a chromogenic substrate used for enzyme detection assays, particularly in the study of phosphatase enzymes. Upon enzymatic hydrolysis, it produces a color change, enabling researchers to visually or quantitatively measure enzyme activity. The 5 g formulation is suitable for medium-scale laboratory experiments and provides reliable, sensitive results. This substrate is frequently used in enzyme activity studies, protein assays, and diagnostic applications. Its ability to produce a stable, measurable color change makes it an ideal choice for biochemical and clinical research, providing a powerful tool for enzyme detection and activity assays.