C.I. Acid Yellow 134

Preparation

N-(3-amino-2-hydroxy-5-nitrophenyl)acetamide diazo, and Pentane-2,4-dione?coupling, and then turn it into cobalt complex.

Properties and Applications

red light yellow. Soluble in water, soluble in alcohol in moderation for yellow orange. The strong sulfuric acid in the dark for the light yellow, diluted for yellow, then into orange precipitation. Its solution to join hydrochloric acid for red after yellow, orange precipitation; Join hydrogen oxidation sodium into dark yellow orange (precipitation). Mainly used for wool, polyamide fiber, silk fiber dyeing and printing of d, also can used for leather color.