Indanthrene brilliant blue

USE Mainly to dye cotton. Indanthrene Blue R, the usual commercial grade, is extremely stable to light and heat, but sensitive to chlorine. A purer grade, which is not as sensi -tive to chlorine, is sold as Indanthrene Brilliant Blue FF. 

It is a blue vat dye discovered in 1901 by Rene Bohn. There are several commercial pigment grades, such as the usual Indanthrene Blue R, and a purer grade called Indanthrene Brilliant Blue FF (de Keijzer, 1990 Merckindex, 1996). 

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