For someone who admittedly know nothing of tear gas, you sure seem to talk like you know a lot about tear gas.
“I
t was a mistake on our part for using ‘tear gas’ because we just assumed people would think CS or CN” — shorthands for types of tear gas which use chemical compounds. The Park Police’s use of pepper balls was classified as OC: that organic version which results in a similar reaction.
CS or CN is "Tear Gas".
Pepperball (as it says) are classified as OC....a far FAR distance from CS or CN.
In order to help you in your quest for knowledge....
OC –
this is probably one of the most common and popular forms of pepper spray. OC stands for Oleoresin Capsicum. The active ingredient is capsaicin which is derived from peppers. The remaining ingredients are mainly fillers. Capsaicin is not soluble in water. Victims are encouraged to blink excessively to produce tears that will flush your eyes and to not touch other body parts as to not spread the substance. There are wipes available to help remove the pepper spray.
CS – or tear gas is an agent that can be used alone or is also combined with OC spray for added affects. Even though there are about 15 types of tear gas, CS is most popular because has shown to be more effective including mild tearing to immediate vomiting to causing the victim to get in a submissively prone position. It is often used for riot control or to force people out of an area. CS can be found in aerosol canisters or can be deployed by grenades.
CN – is another form of tear gas available to and primarily used by military and police agencies. CN has fallen by the wayside as pepper spray works faster. CN has similar affects to CS gas and also include temporary loss of balance and even permanent skin damage. Affects of CN gas last longer than that of CS.