| abstract |
A monoazo compound of the following formula in the free acid form,n wherein A₁ and A₂ are phenylene or naphthylene, Z₁ and Z₂ are -SO₂CH=CH₂ or -SO₂CH₂CH₂Y in which Y is a splittable group, R₁ and R₂ are hydrogen or alkyl, and D is sulfophenyl or sulfonaphthyl, provided that -A₁-Z₁ and -A₂-Z₂ are different from each other when D is sulfophenyl and both R₁ and R₂ are hydrogen, which is useful for dyeing or printing fiber materials to give dyed products of high fastness properties with extremely high color depth. |