Product Name: Indigo /Indigo Blue
Colour Index: C.I. Vat Blue 1
Cas No. 482-89-3
Composion: Phenylethane acid potassium salt reacts to amino sodium through alkali fusion, and then oxidized.
Appearance: Dark blue even Granular and Powder
Shade: To the similar standard of the factory
Particle size(-60 mesh)%: 95