Thiol Definition

This is the chemical structure of cysteine.
This is the chemical structure of the thiol compound cysteine. Todd Helmenstine

Definition: Thiol is an organic sulfur compound composed of an alkyl or aryl group and a sulfur-hydrogen group.

General formula: R-SH where R is an alkyl or aryl group.

The S-H group is also known as a thiol group.

Also Known As: mercaptan

Examples: The amino acid cysteine is a thiol.

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Helmenstine, Anne Marie, Ph.D. "Thiol Definition." ThoughtCo, Feb. 7, 2017, thoughtco.com/thiol-definition-608745. Helmenstine, Anne Marie, Ph.D. (2017, February 7). Thiol Definition. Retrieved from https://www.thoughtco.com/thiol-definition-608745 Helmenstine, Anne Marie, Ph.D. "Thiol Definition." ThoughtCo. https://www.thoughtco.com/thiol-definition-608745 (accessed May 25, 2018).