English

Alternative forms

• sulphonic acid (British)

Noun

sulfonic acid ‎(plural sulfonic acids) (American)

1. (chemistry) a strong inorganic acid, HSO₂OH
2. (chemistry) the univalent functional group -SO₂OH
3. (chemistry) any member of the class or organic acids containing this group; used in detergents, dyes and ion exchange resins

Related terms

• sulfonate