The synthesis of a series of substituted 4-amino-2-nitrodiphenylamines is described. These compounds dye synthetic polymer fibres in bordeaux to violet-blue shades of moderate to poor light fastness. Light fastness properties are enhanced by the use of substituents which decrease the basicity of the 4-amino group; such substitution, however, results in colour shifts into the yellow to orange region.

Substituted 4-amino-2-nitrodiphenylamines can dye synthetic polymer fibers in bordeaux to violet-blue shades with poor light fastness, but color shifts into yellow to orange.

Paper

Derivatives of 4‐amino‐2‐nitrodiphenylamine as dyes for synthetic polymer fibres

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