Sulfonic-acid meaning

Any of several organic acids containing one or more sulfonic groups.

Any of numerous organic acids containing the sulfonic group SO₃H, derived from sulfuric acid by the replacement of an OH group: used in the manufacture of dyes, drugs, phenols, etc.

Any of several acids containing the group SO₃ H attached to an organic radical. Sulfonic acids and their salts are important in industry as catalysts in organic synthesis and in making sulfonamide drugs, detergents, and dyes.