2172-33-0

Reddish-brown powder. Insoluble in water, ethanol, acetone, chloroform, and toluene, slightly soluble in o-chlorophenol and pyridine. Reddish-brown in concentrated sulfuric acid, producing a brownish-yellow precipitate upon dilution. Dark reddish-brown in alkaline sodium hydroxide solution, dark yellow in acidic solution.

Vat Orange 11 is mainly used for cotton fabric dyeing and immersion dyeing, as well as direct printing on cotton fabric. It is also used for dyeing and color matching of silk and vinylon. It has good affinity and leveling properties and is an important low-brittleness fabric yellow dye. It can also be used for paper coloring.

1,5-Diaminoanthraquinone?and 1-Bromoanthracene-9,10-dione? or 1-Chloroanthraquinone(2 Moore) condensation, product Potassium hydroxide with Aluminium chloride or cyclization, with Potassium permanganate again or Sodium hypochlorite oxidation.

Notclassified

1,1' : 5 1,''-Trianthrimide-2,2' : 6,2''- carbazole, Indanthren Yellow 3 R, is prepared from 1,1' : 5,1''- trianthrimide in AlCl3-NaCl melts .

Yellow orange. Yellow powder. Slightly soluble in 2-Chlorophenol and Pyridine , insoluble in Etanol, Acetone, Chloroform and Toluene. The strong sulfuric acid to red light brown, dilute light yellow brown after precipitation. Alkaline reduction for dark red light body hidden color brown; Acid reduction for yellow color body hidden. The light is fragile. Mainly used for dyeing cotton roll and dip, the affinity of cotton cloth is good and the levelness of death and the covering power of cotton are good. Can to cotton direct printing. with Villeneuve shade of Pale, coloured silk high affinity, good fastness. Besides using background color outside, a small amount used to spell color. Sometimes also used for paper dyeing.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	3	5	7	4-5	5	5	5
AATCC	3-4	5	7	5	5