o-chlorobenzylidene malononitrile
Chemical formula: C10H5ClN2
CAS Number: 2698-41-1
Appearance: white crystalline powder, colorless gas when burned
Odor: pepper like
Melting point: 93?
Insoluble in water
Effects: Exposure causes a burning sensation and tearing of the eyes to the extent that the subject cannot keep their eyes open, and a burning irritation of the nose, mouth and throat mucous membranes causing profuse coughing, mucous nasal discharge, disorientation, and difficulty breathing, partially incapacitating the subject.
Application: CS is normally used either as a pure powder in bulk forms or as pellets in a pyrotechnic mixture for employment in burning grenades and bomblets ("Tear Gas"). A yellowish powdered solid in pure form, CS has a characteristic pungent pepper-like odor. Employed in aerosol form, CS irritates the eyes, nose, throat, and (if used in sufficiently high concentration) will cause militarily significant incapacitation.