It’s not really risk that’s an issue, it’s a combination of expensive production, dangerous and expensive storage, and expensive deployment contrasted with a to

It’s not really risk that’s an issue, it’s a combination of expensive production, dangerous and expensive storage, and expensive deployment contrasted with a total lack of efficacy in killing the intended target. Unless your goal is to murder untrained and unequipped civilians, chemical weapons are just not very good weapons. Soldiers are trained, have vehicles with overpressure seals, masks and MOPP suits, detectors and a command structure. The real use for chemical weapons is to terrify civilians and poorly organized/equipped militias. Most of all it’s a way to murder a large number of civilians without destroying infrastructure. Needless to say that’s not something you’d typically do in a war, where destruction of infrastructure is typically step one! As a result most countries recognize the economic and social burden of chemical weapons and their use, and strongly oppose them.