5,6-Dihydroxyindole (Standard) is the analytical standard of 5,6-Dihydroxyindole. This product is intended for research and analytical applications. 5,6-Dihydroxyindole, a melanin precursor, has a broad-spectrum antibacterial, antifungal, antiviral, antiparasitic activity. 5,6-Dihydroxyindole has cytotoxic effects and is strongly toxic against various pathogens[1].