Imperial Chemical Industries Limited

John Stuart Manson

Denis Robert Ridyard

A process for the manufacture of water-soluble anthraquinone dyes having the general formula: ##STR1## wherein Z represents an optionally substituted hydrocarbon residue carrying at least one half sulphuric acid ester or sulphonic acid group which comprises reacting 1,8-dihydroxy-4-amino-5-nitroanthraquinone with a primary amine of the formula:

Anthraquinone dyes

A water-soluble anthraquinone dye having the general formula: ##SPC1## Wherein Z represents an optionally substituted hydrocarbon residue carrying at least one half sulphuric acid ester or sulphonic acid group. The dyes are suitable for the coloration of polyamide textile materials.

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Manchester, United Kingdom

John Stuart Manson