4(2'-Nitro-4'-sulfoanilino) phenyl azo hydroxyphenyl dyes

Details 4(2'-Nitro-4'-sulfoanilino) phenyl azo hydroxyphenyl dyes 4(2'-Nitro-4'-sulfoanilino) phenyl azo hydroxyphenyl dyes

1975-11-18

1978-02-21

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 2912

Patent

active

040752003

ABSTRACT:
Monoazo dyestuffs of the formula ##STR1## wherein the hydroxyl group is in the 2- or 4- position relative to the azo group, R.sup.1 represents hydrogen, halogen, lower alkyl or lower alkoxy and R.sup.2 represents hydrogen or lower alkyl with the proviso that when said hydroxyl group is in the 4- position relative to the azo group and one of R.sup.1 and R.sup.2 is lower alkyl and the other is hydrogen, the said lower alkyl is in a position other than meta to said hydroxyl group. The dyestuffs are useful as acid dyes for Nylon.

REFERENCES:
patent: 3109840 (1963-11-01), Beffa et al.
patent: 3391132 (1968-07-01), Beffa et al.
patent: 3535306 (1970-10-01), Altermatt
patent: 3663531 (1972-05-01), Liechti
patent: 3676050 (1972-07-01), James
patent: 3883503 (1975-05-01), Van Assche et al.
Venkataraman, The Chemistry of Synthetic Dyes, vol. I, Academic Press, Inc.: New York, 1952, p. 270.
Lubs., The Chemistry of Synthetic Dyes & Pigments, Reinhold Publishing Corp.: New York, 1955, pp. 670-671.

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