5,7-dichloro-1,2-dihydro-2-(1-oxonaphtho[2,1-b]thien-2(1H)-ylidene)-3H-indol-3-one

Naphtho[2,1-b]thiophen-1(2H)-one with 2,2,5,7-Tetrachloro-3-indolinone?condensation.

brown. Brown powder. In concentrated sulfuric acid to red light brown, dilution after brown. Alkaline reduction leuco for yellow orange; Acid reduction leuco for yellow. To cellulose fibre substantivity high, good levelness. Used for cotton fabric direct dyeing, reserving and coloring discharge, also can be used for silk and wool dyeing.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	4	4-5	6	4	5