Vat Blue RSN

Blue powder, insoluble in water, acetic acid, acetone, ethanol, pyridine, toluene and xylene, slightly soluble in hot chloroform, lead chloride phenol, quinoline. In concentrated sulfuric acid in brown. Diluted into a blue precipitate. Insurance hunchback in alkaline liquid in the hidden colors also takes the shape of the blue, red in acidic solution to blue. More sensitive to hard water, chlorine bleaching intolerance. Yan blue color, excellent light fastness and weather fastness. Is indanthrene quinone vat dyes.