17,18-dihydrodinaphtho[1',2',3':3,4;3'',2'',1'':9,10]perylo[1,12-efg][1,4]dioxocin-5,10-dione

16,17-Dihydroxyviolanthrone in 1,2,4 – Trichlorobenzene presence, with 1,2-Dibromoethane?or 2-Chloroethyl 4-methylbenzenesulfonate?ethyl ether sulfonate..

Non flammable

navy blue. Deep blue black powder. Soluble in Xylene for blue purple. In concentrated sulfuric acid to blue light red. Alkaline reduction leuco for blue; Acid reduction leuco for bordeaux red. Dyeing levelness sex is good. Soluble in Xylene for blue purple. Used for cotton fiber dyeing, also can be used for direct printing, resist printing and discharge printing, not suitable for white discharge printing. Can also be used for viscose and silk dyeing.

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