lachrymator

https://doi.org/10.1351/goldbook.L03434
A substance which produces a flow of tears in a person or animal (e.g. acetyl chloride, acrylaldehyde, etc.).
Source:
PAC, 1990, 62, 2167. (Glossary of atmospheric chemistry terms (Recommendations 1990)) on page 2199 [Terms] [Paper]