Importance

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Abstract

Monoazo colorants represented by the general formula (I): ##STR1## wherein: D represents ##STR2## (wherein X represents a hydrogen atom or a halogen atom, and Y represents a nitro group, a lower alkylsulfonyl group, a thiocyanic acid group or a halogen atom), or ##STR3## (wherein P represents a nitro group or a lower alkylsulfonyl group, and Q and T each represents a hydrogen atom, a halogen atom or a cyano group); R.sup.1 and R.sup.2 each represents an ethylene group or a propylene group; R.sup.3 and R.sup.4 each represents a hydrogen atom or an alkyl group which may be substituted by a lower alkoxy group or a lower alkoxyalkoxy group; and Z represents a halogen atom. This monoazo colorants include a reactive type pyridine-based monoazo dye suitable for use in dyeing of cellulose or cellulose/polyester mixed fibers in red to orange.

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First Claim