CNS is a mixture of chloroacetophenone, chloropicrin and chloroform that is used as a chemical warfare agent. CNS has the lachrymatory effects of chloroacetophenone and choking effects of chloropicrin. It has a flypaper-like odor.

CNS was used as a riot control agent, but it is no longer used.

References



OPCW report confirms use of chemical weapons in April 4 attack in Khan

New Report Highlights Key Technologies that Can Identify Source of

Chemical Weapons Used Rarely — But With Deadly Effect Parallels NPR

AI suggested 40,000 new possible chemical weapons in just six hours

Organisation for the Prohibition of Chemical Weapons to release