Dyestuff containing at least three azo bridges

Organic compounds -- part of the class 532-570 series – Organic compounds – Azo

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Details

8641, 534806, 534810, 534811, 534815, C09B 29045, C09B 3118, C09B 3322, C09B 3524

Patent

active

044850425

ABSTRACT:
Leathers can be advantageously dyed with water-soluble polyazo dyestuffs having, in the form of the free acid, the formula ##STR1## wherein A is a member of the benzene, naphthalene or heterocyclic series;

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patent: 2833756 (1958-05-01), Fleischhauer
patent: 2885390 (1959-05-01), Huss et al.
patent: 2885391 (1959-05-01), Huss et al.

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