Water-soluble monoazo colorant and dyeing process by using the same.

摘要

A water-soluble monoazo colorant represented by formula (I) in a form of a free acid: <CHEM> wherein D represents <CHEM> or <CHEM> (wherein W<2> represents lower alkoxy; U represents lower alkyl or lower alkoxy; Z represents -CH=CHOr -CH2CH2OSO3H and p and q represent each 0 or 1); W<1> represents lower alkoxy; and V represents <CHEM> or <CHEM> (wherein X represents halogen; Y represents halogen, sulfo, -OR<1> wherein R<1> represents lower alkyl optionally substituted by hydroxy, carboxy or sulfo, -O @@R<2>O@@@R<3> wherein R<2> represents lower alkylene, R<3> represents lower alkyl and m is an integer of 1 to 6, or aliphatic or aromatic amino each substituted by one or two sulfo or carboxy groups); as well as a dyeing process by using the same.