sodium [6-amino-5-[(2-hydroxy-4-nitrophenyl)azo]naphthalene-1-sulphonato(3-)]hydroxychromate(1-)

Preparation

2-Amino-5-nitrophenol diazo, and 6-Aminonaphthalene-1-sulfonic acid?coupling, then use formic acid chromium processing.

Properties and Applications

blue light green. Variegated dark green powder. Soluble in water and ethanol (a green), slightly soluble in soluble fiber element. Meet strong sulfuric acid is blue light red, it will be diluted from blue to green solution. Its water solution meet 10% sodium hydroxide solution without change color. Used for wool, silk and polyamide fiber of dyeing and printing, also used in leather, paper dyeing and electrochemical aluminum color. Especially for the influential wool carpet and color.