FWIW I've tried to do my research and CS seems to be the one we were exposed to (it was also called that at the time but I didn't want to say it as I wouldn't state that as a fact based on what I heard informally 20 years ago.)

We were a few hundred recruits who were exposed to it at that week and everyone seemed to be fine next day.

I'm fourty now and I've never experienced any problem that I would guess comes from my experience with tear gas.

(FWIW, I was exposed to it in a closed room but only briefly, not more than a minute or so I'd guess, possibly less.)