Acid disazo dyestuffs containing a substituted thiophene middle

Details Acid disazo dyestuffs containing a substituted thiophene middle Acid disazo dyestuffs containing a substituted thiophene middle

1975-09-11

1979-12-25

Warren, Charles F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260156, 260157, 260158, 260160, 260165, C09B 3114, C09B 3104, C09B 3106, C09B 3108

Patent

active

041805038

ABSTRACT:
Dyestuffs which in the free acid form correspond to the formula ##STR1## wherein A represents the radical of an aromatic carbocyclic or aromatic heterocyclic diazo component,

REFERENCES:
patent: 2805218 (1957-09-01), Towne et al.
patent: 3485814 (1969-12-01), Speck
patent: 3544550 (1970-12-01), Anderton et al.
patent: 3553190 (1971-01-01), Anderton et al.
patent: 3657220 (1972-04-01), Kilmurry
patent: 3676050 (1972-07-01), James
Sorokin, Chemical Abstracts, vol. 61, 1964, 8444c.
Venkataraman, The Chemistry of Synthetic Dyes, vol. 1, Academic Press, Inc.: New York, 1952, p. 270.

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