Ukraine has documented over 10,000 Russian chemical attacks and submitted evidence to The Hague, as pressure mounts for international action and accountability.
Archived version: https://archive.is/newest/https://www.kyivpost.com/post/57267
Disclaimer: The article linked is from a single source with a single perspective. Make sure to cross-check information against multiple sources to get a comprehensive view on the situation.
Probably specifically because they have non-war uses (even if the police ones shouldn’t be used like that, they currently are). The convention classifies chemical weapons differently depending on their civilian uses, so you can stockpile a lot of pesticide without attracting attention much more easily than you can stockpile a lot of novichok