7,16-Dibromo-6,15-dihydroanthrazine-5,9,14,18-tetrone

(a) blue anthrone in sulfuric acid in bromination, (b) in the presence of copper chloride 2-Aminoanthracene-9,10-dione (2 Moore) from condensation.

brilliant blue. Not soluble in ethanol. In concentrated sulfuric acid to dark yellow brown. Dilution after blue precipitation; In the basic insurance powder solution for blue; In the acidic insurance powder solution for blue.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	5	3	7-8	4	4-5