Meaning of sulfonic acid

sulfon'ic ac'id

Pronunciation: [key]
— Chem. Chem.
  1. any of a large group of organic compounds of the structure RSOOH, which are strong acids that give neutral sodium salts: used in the synthesis of phenols, dyes, and other substances.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.