4-Chloro-2-nitrophenylurea (CAS NO.7153-86-8), its Synonyms are Urea,N-(4-chloro-2-nitrophenyl)- ; Urea,(4-chloro-2-nitrophenyl)- (8CI,9CI) ; (4-chloro-2-nitrophenyl)urea ; N-(4-Chloro-3-nitrophenyl)-urea .