Chloropicrin is also known as vomiting gas. Inhalation of it’s mist or fumes causes projectile vomiting in humans. Easily made and mixed with CS gas and delivery systems.

Chloropicrin:

Chloropicrin is also known as vomiting gas. Though not really a gas but a liquid, the inhalation of it’s mist or fumes causes projectile vomiting in humans. It’s production is easy but requires some special equipment. Needed are a chemical hood or glove box, protective clothing and a gas mask or clean air respirator.

Chloropicrin (known in chemwarfare circles as PS) can be mixed with either CN or CS teargas. The makes a very nasty chemweapon. The effects of both substances are magnified. The effects of this mix does not wear off in an hour or so but can continue for a week or more. There are reports of effected people committing suicide because of the pain and discomfort.

PS or Chloropicrin can cause the throat and stomach muscles to rip because of the force of the vomiting. …source