Production of o-Dianisidine by Bacterial Decomposition of Direct Sky Blue 6B

Abstract

Direct Sky Blue 6B, a dyestuff used in leather, paper, and cloth industries, was decomposed by the cecal content of a guinea pig and the mixed culture of 4 kinds of bacteria (Escherichia coli, Proteus vulgaris, Pseudomonus aeruginosa, and Klebsiella pneumoniae). As the main product of the decomposition, o-dianisidine was detected, and this compound was assumed to be formed by the azo-reductive fission of the dye.