Acid Yellow 42

2,2′-Disulfo-4,4,diaminobibenzene double nitriding, and 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one? (2 Moore) coupled.

Not classified

yellow to red light yellow. Bright yellow powder. A lemon yellow soluble in water, soluble in ethanol is lemon yellow, slightly soluble in acetone. Meet strong sulfuric acid is lemon yellow, dilute still is shown after lemon yellow. Its water solution meet strong hydrochloric acid is lemon yellow; Sodium hydroxide solution meet strong a lemon yellow. In dyeing of copper (a little red dark, encounter chromium ion unchanged, encounter iron ion turn green dark. Mainly used for wool dyeing and can be used for wool, silk and glue directly printing, has the good discharge sex, can be used for the polyamide fiber dyeing and leather shading.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	4-5	4-5	5	4-5	4	5	4	5
AATCC	4	4-5	4-5	4-5	1	2-3	4-5	4-5