The elemental analyses of the prepared dyes referred to the
general formulae of o-phenylazo- (C14H13 N3 O2) (I), p-bromoo-phenylazo- (C14H13 BrN3 O2) (II), p-methoxy-o-phenaylazo-
(C15H16N3 O3 ) (III) and p-nitro-o-phenylazo-p-acetamidophenol
(C14H13 N4O4) (IV) compounds, respectively.