Optionally reactive 1-amino-2-(phenylazo)-7-(2-halophenylazo)-8-hydroxynaphthalene-disulphonic acid derivatives with improved resistance to peroxy wash fading

摘要

Dyes having the formula EMI ID=1.1 HE=57 WI=121 LX=494 LY=735 TI=CF PC```[wherein X is fluorine, chlorine, bromine or iodine; RSB1/SB is fluorine, chlorine, bromine, iodine, hydrogen or RSB3/SB; RSB2/SB is independently hydrogen or RSB3/SB; RSB3/SB is independently selected from -SOSB3/SBH, -NOSB2/SB, a fibre-reactive group or any moiety linked to the benzene ring by a carbon atom; n is 0, 1, 2 or 3; m is 0, 1, 2 or 3.]BR ```provide improved resistance to fading when washed by aqueous peroxy wash liquors by virtue of the 2-halo or 2,6-dihalo substitution on ring A.