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Sulphanilic acid (4-aminobenzene sulfonic acid ) is a colourless crystalline solid produced from sulfonation of aniline.
Additional recommended knowledge
It readily forms diazo compounds and is used to make dyes and sulpha drugs. 
It is a zwitter ion with an unusual high melting point.
Categories: Sulfonic acids | Aromatic amines
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Sulfanilic_acid". A list of authors is available in Wikipedia.|