38293-71-9 ACETOPHENONE, 2-CHLORO-, 2,4-DINITROPHENYLHYDRAZONE Acetophenone, 2-chloro-, 2,4-(dinitrophenyl)hydrazone Ethanone, 2-chloro-1-phenyl-, (2,4-dinitrophenyl)hydrazone (9CI) NSC 156648 omega-Chloroacetophenone-2,4-dinitrophenylhydrazone