3-15-00-00427 (Beilstein Handbook Reference) 5135-80-8 Acetaldehyde, chloro-, (2,4-dinitrophenyl)hydrazone BRN 0673855 Chloracetaldehyd-2,4-dinitrofenylhydrazon [Czech] Chloroacetaldehyde (2,4-dinitrophenyl)hydrazone Monochloroacetaldehyde 2,4-dinitrophenylhydrazone NSC 158952 OM1763 Olin 1763