Dimethyl mercury is one of the worst compounds IME. Even if you were protective gloves, it can't save you from a single drop of the stuff. This unfortunately lady became the poster girl for organo-metallic chemistry lab safety after she became exposed in this way. It took a year to kill her and she died a terrible death. Terrifying stuff...
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https://en.wikipedia.org/wiki/Karen_Wetterhahn
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Jinxie