Tetraazo direct urea-derived dye having a core of H-acid, K-acid

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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260190, 260191, 260198, C09B 4314

Patent

active

040136345

ABSTRACT:
Water-soluble polyazo direct dyes for paper and other cellulosics having the formula ##SPC1##
Wherein:

REFERENCES:
patent: 2228415 (1941-01-01), Sparks et al.
patent: 2264681 (1941-12-01), Rossander et al.
patent: 2417306 (1947-03-01), Krebser et al.
patent: 2842538 (1958-07-01), Byland
patent: 2885391 (1959-05-01), Huss et al.

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