Acid Yellow 44

Preparation

5-Amino-2-(4-amino-5-methyl-2-sulfophenyl)-4-methylbenzenesulfonic acid double nitriding, and 3-Oxo-N-phenylbutanamide (2 Moore) coupled.

Properties and Applications

green light yellow. Yellow powder. Soluble in water (a bright green light yellow), slightly soluble in ethanol, acetone and soluble fiber element. Strong sulfuric acid in the dark yellow, diluted green light yellow turn; Meet nitric acid for red orange, green light to yellow. Its water solution and strong hydrochloric acid is the red, alkali solution in yellow. Mainly used for silk, polyamide fiber and wool dyeing and printing directly, also can used for leather dyeing.