Off topic, but that reminded me of some horror stories from my chemistry days:

Dimethylmercury able to kill through 2 drops absorbed through a latex glove: https://www.acsh.org/news/2016/06/06/two-drops-of-death-dime...

And of course the amazing series of ‘things I won’t work with’. E.g.: https://blogs.sciencemag.org/pipeline/archives/2014/10/10/th...