Collect. Czech. Chem. Commun. 1992, 57, 1221-1229

Extraction Spectrophotometric Determination of [(2-Chlorophenyl)methylene]propane Dinitrile with Reactive Dyes of the Stabilized Diazonium Salt Type

Emil Halámek and Zbyněk Kobliha

Department of Chemistry, Military University, 682 03 Vyškov


A spectrophotometric method has been developed for the determination of [(2-chlorophenyl)methylene]propane dinitrile (CS) stabilized by the diazonium salts Fast Red TR and Fast Blue B after extraction with chloroform. Mass spectrometry, 1H and 13C NMR and elemental analysis confirmed the presence of the hydrazoform of the azo dye formed by reaction with malononitrile, as a product of the alkaline hydrolysis of substance CS, and the diazonium salt Fast Red TR.