Water-insoluble monoazo 3-cyano-4-methyl-6-hydroxy-2-pyridine dyestuffs

Abstract

Dyestuffs, free of ionic groups, of the formula: ##STR1## wherein R is alkyl having 1 to 6 carbon atoms and the utility thereof in the dyeing and printing of synthetic materials deep yellow with excellent fastness properties.

Dependencies are inferred from the claim text.