52817-64-8 BRN 0745657 F 2360 FORMALDEHYDE, NITRO-, (p-CHLOROPHENYL)HYDRAZONE Formaldehyde, nitro-, (4-chlorophenyl)hydrazone Nitro-formaldehyd-4-chlor-phenyl-hydrazon [German] Nitroformaldehyde (p-chlorophenyl)hydrazone