C.I. Direct orange 2

4-(4-Aminophenyl)benzenamine double nitriding, first with 2-Hydroxybenzoic acid coupling, again with 6-(3-Methyl-5-oxo-4,5-dihydropyrazol-1-yl)naphthalene-1,3-disulfonic acid?(0.75 Moore) and 1-(3-Sulfophenyl)-3-methyl-5-pyrazolone (0.25 Moore) coupled.

orange. Soluble in water for gold orange, and adequate soluble in ethanol for golden brown. The strong sulfuric acid for blue-ray red to purple, diluted for golden brown. The dye solution to join strong hydrochloric acid for yellow olive, and have precipitation; Add thick sodium hydroxide solution for orange. Apply to cotton dyeing, can also be used to soap class, paper and leather color. White sex is good, alkaline white poor. Copper ions in dyeing color is red; Iron ion in the red light. Exhaust dyeing.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	3	4	4	2		2