Chlorosarin is a chemical precursor used in the final step of one method for the production of the nerve agent sarin.

Chlorosarin will produce effects similar to those of sarin if it is absorbed into body, but they are less severe.

[1] Like GB, ClGB presents a varied preparation route.

Overall, it is a lower cost chemical warfare agent than sarin.

[2] Chlorosarin can be synthesized from diisopropyl methylphosphonate (DIMP) and phosgene.