Acid Yellow 128

Preparation

3-Amino-4-hydroxybenzenesulfonamide diazo, and 3-Oxo-N-phenylbutanamide coupling, and then use cobalt chloride complex.

Properties and Applications

green light yellow. Tan evenly all powder, soluble in water. The strong sulfuric acid for yellow, diluted light yellow solution; In nitric acid was damaged in, a small residual yellow; In strong hydrochloric acid in the same light, diluted light yellow; In the thick of sodium hydroxide solution for yellow, diluted light yellow. Its water solution for light yellow. Structure and the C.I.Acid Yellow 151 the same. Used for wool, silk, polyamide, d theory and

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	7	4-5	4-5	4-5	4-5	4	5	5