Sulfanilic acidSulfanilic acid (4-aminobenzenesulfonic acid) is an organic compound with the formula H3NC6H4SO3. It is an off-white solid. It is a zwitterion, which explains its high melting point compared to the related compounds aniline and benzenesulfonic acid. Read from the Chembox of the Wikipedia article Sulfanilic acid, revision 1380059671.

Property

Value

Formula

C6H7NO3S, 173.19 g/mol

Melting point

288 °C

Density

1.485 g/cm³

pKa

3.23

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