Chemical formula of weeping gas

Answer 1

I think you might have meant: "Tear gas" (lachrimatory agent).

This is a group of agents, some of which are more generally known and used as 'Riot control agents', like pepper spray.

Cf. Added Related links (at the left bottom of this answer page).

One chemical formula:

Nonivamide, also called pelargonic acid vanillylamide or PAVA,

C17H27NO3,

IUPAC name: N-[(4-hydroxy-3-methoxyphenyl)methyl]nonanamide.

(It naturally occurs in chili peppers and is used as 'spicing' food additive)

Another chemical formula:

CS-gas, which is basically also considered as an 'Army NBC'-weapon.

2-chlorobenzalmalononitrile (also called o-Chlorobenzylidene Malononitrile)

chemical formula: C10H5ClN2