Studies on the Structure of Itaconitin. II. Identification of Organic Acids as p-Aminoazobenzene Derivatives

Abstract

A new method was devised for identification of fatty acids of C₁∼C₁0 series as colored p-aminoazobenzene derivatives, which were prepared by condensation between p-aminoazobenzene and the fatty acid. On accout of their high melting point and large crystal form, they were considered to be convenient derivatives for the identification of fatty acids. The mixture of p-formamidoazobenzene, p-acetamidoazobenzene, and p-propionylaminoazobenzene was separated clearly into the components by chromatography on alumina.