para Chloro Benzaldehye | 2,4-Dichloro Benzaldehyde Item No. Chemical Name CAS No. Structure Typical Usage CN Name 1 4-Chlorobenzaldehyde 104-88-1 对氯苯甲醛 1 2,4-DiChlorobenzaldehyde 874-42-0 2,4-二氯苯甲醛