Acid yellow 54

Chemical properties

rust-brown powder

Preparation

2-Amino-4-sulfobenzoic acid?diazo, and 3-Methyl-4-(3-methyl-5-oxo-4,5-dihydropyrazol-1-yl)benzenesulfonic acid coupling, and then under certain pressure, in aqueous solution and formic acid chromium common heating, into chromium complex.

Properties and Applications

yellow. Yellow powder, soluble in water. The strong sulfuric acid dyes for yellow solution, diluted the same color. The water solution is yellow, and sodium hydroxide to dark brown; Barium chloride and create white precipitation. Levelness and discharge of copper ions in dyeing color becomes the red, encounter iron ion colored light is dark. Used for wool, polyamide fiber and wool blended fabric dyeing and printing, also used in leather color. Mainly used for dyeing fine, coarse textiles, loose wool, wool tops, wool knitted fabrics, carpets and so on.