Molecular Formula | C20H9BrClNO2S |
Molar Mass | 442.71296 |
Physical and Chemical Properties | Black powder with metallic luster. Insoluble in water, xylene, soluble in pyridine (blue with brown red fluorescence). Dark purple in concentrated sulfuric acid. In the alkaline solution of sodium hydrosulfite red light purple, in the acidic liquid yellow light brown. |
purpose | reduced direct black SNA is mainly used for dyeing cotton fiber and printing cotton fabric, and also used for dyeing Vinylon and viscose fiber. used for dyeing cotton fiber and so on |
production method | with Violet anthrone (violanthrone, C. Et al. 1.59800) as starting material, reaction with hydroxylamine (or salt of hydroxylamine) in concentrated sulfuric acid to obtain product. After isolation, dilution, filtration, washing, and filtration, the finished product is obtained.. |