Add time:08/08/2019         Source:sciencedirect.com

The synthesis of a series of trisazo direct dyes obtained by tetrazotization of 4,4′-diaminophenylsulphide and coupling with H-acid and m-phenylenediamines, phenol or resorcinol is described. These compounds dye cotton in green and black shades with good build-up and levelling properties. It can be concluded that trisazo dyes derived from 4,4′-diaminodiphenylsulphide have superior substantivity and wash fastness on cotton than C.I. Direct Black 38 and C.I. Direct Green 1.

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