3H-Indol-3-one, 5,7-dichloro-2-(4-chloro-1-oxo-2(1H)-naphthalenylidene)-1,2-dihydro-4,6-dimethyl-

2,5,7-Trichloro-4,6-dimethyl-3H-indol-3-one?and 4-chloronaphthalen-1-ol condensation in chlorobenzene..

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

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