| abstract |
Triphenodioxazine reactive dyes of the formula:n wherein each of T¹ and T², independently, represents H, Cl, Br, F, SO₃H or an optionally substituted alkyl or aryl radical; n R¹ represents H or an optionally substituted hydrocarbon or heterocyclic radical; n R² represents an optionally substituted hydrocarbon radical; n A represents C 1-4 -alkyl, C 1-4 -alkoxy, Cl, COOH or SO₃H, and nn has a value of 0 or 1, nthe nature of the substituents being such that the dyes contain at least two SO₃H groups and at least two fibre-reactive groups. |