Direct black dye

Details Direct black dye Direct black dye

1979-03-27

1981-03-10

Niebling, John F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260169, C09B 3116, C09H 3116

Patent

active

042553270

ABSTRACT:
This invention relates to a new group of trisazo compounds that are useful as direct dyes for cellulosic textiles, paper and leather; imparting a black coloration thereto. The new dye is intended to replace the widely used paper dye known as C.I. Direct Black 38--a dye synthesized from an intermediate (benzidine) whose use is being curtailed because it is a known carcinogen.

REFERENCES:
patent: 526763 (1894-10-01), Weinberg
patent: 2018234 (1935-10-01), Smith
patent: 3927163 (1975-12-01), Papa et al.
patent: 4052380 (1977-10-01), Gaetani et al.
Venkataraman, vol. I pp. 449, 450, 575.
Colour Index, p. 4294 (C.I. Nos. 31560, 31565).
Color Index, 3rd Ed., vol. 4, p. 4314, No. 34000.

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