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Product:
  H-Acid
C.A.S:
  90-20-0
Assay:
  85%
Package:
  25kg/woven bag
Usage:
  used to produce all kinds of azo dyes, used to dye wools, textiles, papers and paper textiles; also used to synthesize pharmaceutical.
Description:
  Physical and Chemical Properties: (1)the solubility in water is 0.17% (20°C); (2)the solubility in water is 2.40% (60C°C); (3)insoluble in alcohol and aether; (4)soluble in solutions of alkali, sodium carbonate and ammonia; (5)the dilute solutiono f 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, appears dark green when dissolving in alkali solution.

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