Application
Aromatic sulfonic acids are intermediates in the preparation of dyes and many pharmaceuticals. Sulfonation of aniline produces p-aminobenzenesulfonic acid or sulfanilic acid which is a zwitterion with an unusual high melting point. The amide of this compound and related compounds form a large group of sulfa drugs.
Sulfonation of polystyrene can be used to prepare sodium polystyrene sulfonate.
Read more about this topic: Aromatic Sulfonation
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