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toluenesulfonic acid

noun

tol·​u·​ene·​sul·​fon·​ic acid
variants or British toluenesulphonic acid
: any of three isomeric crystalline oily liquid strong acids CH3C6H4SO3H of which the para isomer has important use in organic synthesis (as of dyes)

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“Toluenesulfonic acid.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/toluenesulfonic%20acid. Accessed 27 Nov. 2025.

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