Sulfonic acid

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Chemical structure of sulfonic acid.

Sulfonic acid is a strong acid of the formula H-S(=0)(=O)-OH or H2SO3. Its anion and its salts are called sulfonates.

The sulfonic acid or sulfonate functional group -S(=0)(=O)-OH or -SO3H is found in many chemical compounds, e.g. certain detergents and dyes as well as in strongly acidic cation exchange resins.

See also

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See also: Sulfonic acid, Acid, Anion, Chemical compound, Detergent, Dye, Functional group, Ion exchange resin