5,7-dichloro-1,2-dihydro-2-(5,6,7-trichloro-3-oxobenzo[b]thien-2(3H)-ylidene)-3H-indol-3-one

2,5,7-Trichloro-3-pseudoindolone?and 5,6,7-Trichloro-3-thianaphthenone condensation.

blue light purple. In concentrated sulfuric acid to blue light green, dilution after purple; In concentrated nitric acid for purple; In the basic insurance powder solution for golden brown. In acid insurance powder solution for pale yellow.

Standard	Ironing Fastness	Chlorine bleach	Light Fastness	Mercerized	Oxygen bleach	Soaping
						Fading	Stain
ISO	3-4	4-5	5-6	4	3-4