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For example, this site tells that the taste of Copper sulfate, (which is very dangerous for consumption) is of "metallic, nauseating taste" and as many dangerous chemical compounds often have taste descriptions, does this mean people eat them to taste test?

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    $\begingroup$ Yes, perhaps many years ago... and some of those rather cavalier experimentalists are no longer with us. Read acsh.org/news/2016/02/14/fluorine-element-hell or blogs.sciencemag.org/pipeline/archives/2010/02/23/…, for some other examples. $\endgroup$ Jun 3 '19 at 2:58
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  • $\begingroup$ Newton in his older age was experimenting with testing of chemicals, including mercury compounds what is considered as reason for his related neurological problems. $\endgroup$
    – Poutnik
    Jun 3 '19 at 7:20
  • $\begingroup$ Also, while working, you get to taste and smell a lot of things. Knowledge and regulations protect us, but I know the smells of hundreds compounds that I didn't deliberately smell or want to smell. If you would apply copper sulphate to trees or grape, you will get a feeling of its taste. (If not nowadays, surely it was at our grandparents time). Think of gluing something, too. $\endgroup$
    – Alchimista
    Jun 3 '19 at 10:19
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    $\begingroup$ Ah, tasting. I guess tasting was more frequent in time of alchemy than it is now. $\endgroup$
    – Poutnik
    Jun 4 '19 at 20:31

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