| Properties: Physical and Chemical Properties: (1)the solubility in water is 0.17% (20C); (2)the solubility in water is 2.40% (60C); (3)insoluble in alcohol and aether; (4)soluble in solutions of alkali, sodium carbonate and ammonia; (5)the dilute solution of H-acid appears blue red fluorescence; (6)H-acid can couple in both acid and alkali condition; (7)A. The alkali solution of H-acid fast becomes dark in air; B. To produce yellow crystalline diazo compound when reacting with nitrous acid; C. Diazo compounds are soluble in soda and alkali solution; D. Appears light violet when dissolving in soda solution, E. Appears dark green when dissolving in alkali solution. Main Uses: Used to produce all kinds of azo dyes, used to dye wools, textiles, papers... |
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