|thiol (thī'ôl', -ōl') Pronunciation Key
A sulfur-containing organic compound having the general formula RSH, where R is another element or radical. Thiols are typically very volatile and strong-smelling, and are responsible for the odor of onions, garlic, rotting flesh, and skunk musk. Also called mercaptan.
any of a class of organic chemical compounds similar to the alcohols and phenols but containing a sulfur atom in place of the oxygen atom. Thiols are among the odorous principles in the scent of skunks and of freshly chopped onions; their presence in petroleum and natural gas is objectionable because they have disagreeable odours, interfere with catalysts used in refining processes, and produce sulfur dioxide upon combustion.
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