Thiol is such a great word!

A thiol is basically an alcohol, but instead of an -OH group, they have a -SH group. That's where the "ol" part comes from.

The "thi-" part comes from "theion," the Greek word for sulfur. It's also an ancient word for divine fire, e.g. the "fire" part of "fire and brimstone." Very interested in this sulfur / bad smell / satan cloud of meanings around all of it.

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Mercaptan less so: these compounds are good at capturing mercury. Mercaptans.

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