6537-66-2

Reddish-brown powder. Easily soluble in water, with solubility of 30g/L at 60°C and 48g/L at 98°C. The aqueous solution is golden yellow, turning orange-red brown upon addition of concentrated hydrochloric acid and golden yellow upon addition of concentrated sodium hydroxide. Slightly soluble in ethanol, it is lemon-white. In concentrated sulfuric acid, it is orange-red brown, turning golden yellow upon dilution. The color changes slightly when exposed to copper and iron ions during dyeing. It exhibits good chlorine resistance and is resistant to reduction by Rongalite and alkali sulfide.

use sodium hypochlorite processing C.I. Direct Yellow 59 (C.I. 49000) solution.

red light yellow. Palm red powder. Soluble in water for golden brown, solubility of 30 g/L (60 ℃), 48 g/L (98 ℃), soluble in ethanol is shallow lemon yellow. The strong sulfuric acid for orange red brown, diluted into gold. The dye solution with strong hydrochloric acid into orange red brown; Add thick sodium hydroxide solution into a golden brown. In dyeing copper and iron ion colored light slight change. Good resistance to chlorine stability,On Rongalite and sodium sulfide reduction-resistant. Used for cotton and viscose fiber dyeing and can be directly printing and white, can and dispersal dyes with bath of high temperature on polyester/cotton blended fabric dyeing, used for leather and paper shading.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
AATCC	5	4	4-5	4-5		3-4