1328-41-2

1,4-Diamino-2,3-ditbromoanthracene-9,10-dione or 1,4-Diamino-2,3-dichloroanthracene-9,10-dione in copper catalyst and tie acid agent under the existence of condensation.

3,3'-Dichloro-4,4'-diaminoindanthrone, Indanthren Green BB, is prepared from 1,4-diamino-2,3- dichloroanthraquinone in naphthalene in the presence of copper powder .

blue light green. Variegated dark green powder. Insoluble in Xylene. In concentrated sulfuric acid for green, blue green precipitation after dilution. Alkaline reduction leuco for deep green light blue; Acid reduction leuco for skipper. Mainly used for dyeing cotton fabric.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	5	1	7-8	4-5	4-5	4	4