1) Xylyl bromide-Lachrymatory, toxic

2) Chlorine - Corrosive. Lung Irritant

3) Phosgene - Irritant - Skin and mucous membranes. Corrosive, toxic

4) Benzyl bromide - Lachrymatory (lacrimatory: relating to or prompting tears)

5) Chloromethyl chloroformate - Irritant - Eyes, skin, lungs

6) Trichloromethyl chloroformate- Severe irritant, causes burns

7) Chloropicrin - Irritant, lachrymatory, toxic

8) Stannic chloride -Severe irritant, causes burns

9) Ethyl iodoacetate-Lachrymatory, toxic

10) Bromoacetone-Lachrymatory, irritant

11) Monobromomethyl ethyl ketone- Lachrymatory, irritant

12) Acrolein-Lachrymatory, toxic

13) Hydrogen cyanide (Prussic acid)-Toxic, Chemical Asphyxiant (Asphyxiant-Gas or vapor that can cause unconsciousness or death by suffocation due to lack of oxygen.)

14) Hydrogen sulfide (Sulphuretted hydrogen)-Irritant, toxic

15) Diphenylchloroarsine-(Diphenyl chlorasine)-Irritant/Sternutatory (Sternutatory-causing or having the effect of sneezing)

16) A-Chlorotoluene (Benzyl chloride) - Irritant, lachrymatory

17) Mustard gas (Bis(2-chloroethyl) sulfide)-Vesicant (blistering agent), lung irritant

18) Bis(chloromethyl) ether (Dichloromethyl ether)-Irritant, can blur vision

19) Ethyldichloroarsine-Vesicant-a chemical agent that causes blistering

20) N-Ethylcarbazole- irritant

LACHRYMATORY, also spelled as "lacrimatory", pertains to crying tears.

The chemical name of Tear gas is 2-chlorobenzalmalononitrile or o-Chlorobenzylidene Malononitrile.(C10H5ClN2). Tear Gas aka CS Gas.

In 2012 the Japanese discovered that lachrymatory-factor synthase released by the onion makes a person tear. You don't cry in the strictest sense, the synthase make the eye produce tears to wash out of the eye.