I've never herd of CS GAS. But like capngeo Laquer thinner from refinishing furniture was the worst chemical I ever had get into my eyes it really hurts acetone,Methylene cloride,toluene,ect. To me everyone is different but that stuff HURTS and will have you running for water
.When I started rinsing my eye it had gotten in it really burnt! I would'nt wish that on anyone a big can of hornet spray is good with a long range much better than pepper spray with only about five feet spray distance.