Indigo Blue

Indigo Blue (CI 73000), 2-(1,3-Dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one is known as Indigo, an artificial dye used mainly in the textile industry and in the coloring of cosmetic products. Indigo Blue is a synthetic organic dye belonging to the indigoid family of dyes, structurally similar to natural indigo but obtained...