1. Used as an intermediate for pyrimethamine and in the synthesis of medicine and dyes.

2. p-chlorobenzyl cyanide, or p-chlorobenzene acetonitrile, is an intermediate for the preparation of 3-methyl-2-(4-chlorophenyl) butyric acid, which can be used to prepare pyrethroids such as fenvalerate and deltamethrin Insecticide, and can be used in the pharmaceutical industry to prepare pyrimethamine.

3. Intermediate of the drug pyrimethamine. Used in the manufacture of p-chlorobenzyl alcohol, p-chlorobenzaldehyde, p-chlorobenzene acetonitrile, etc.

4. It is an intermediate for the production of pyrimethamine (2,4-diamino-6-ethyl-5-p-chlorophenylpyrimidine).