Product Description: Indigo (Standard) is the analytical standard of Indigo. This product is intended for research and analytical applications. Indigo is a deep and rich color dye for indole stain, isolated from the plant Indigofera tinctoria and related species[1].
Formula: C16H10N2O2
References: [1]Maerz and Paul A Dictionary of Color New York:1930 McGraw-Hill Page 197; Color Sample of Indigo: Page 117 Plate 47 Color Sample E10.