Question: What's the most dangerous chemical you've ever worked with, what damage could it do?

Jayne Ede answered on 3 Nov 2017:

Nerve agents. They’re absolutely horrible poisons that were developed during and after the second world war. They work by messing up your nerve signalling pathways which leads to some pretty severe physical symptoms, and death in a high enough dose (but that dose is extremely small, less than a raindrop on the skin). People where I work find antidotes for the poisons and I find chemical mixtures that can destroy them.