Vat Blue 4 CAS No.81-77-6

Dynathrene dyes offer excellent fastness to washing, light and bleaching for cellulosic fiber. Dynathrene C.I. Vat CAS No. Characteristics Blue RSN Blue 4 81-77-6 Brilliant Reddish Blue Properties and Applications:   brilliant red light blue. Blue black powder. Insoluble in water, acetic acid, Pyridine , toluene, Xylene, Acetone and ethanol, slightly soluble in hot Chloroform, 2 – Chlorophenol and Quinoline. Alkaline reduction leuco for blue; Acid reduction leuco for red light blue. In concentrated sulfuric acid for brown, dilution after blue precipitation. Easy excessive oxidation and reduction, the solid water sensitive, no resistance to chlorine bleaching. Widely used in yarn leuco dye and super fine powder can be used for cotton and polyester/cotton…