Sulfanilic acid



Sulfanilic acid
IUPAC name p-aminobenzenesulphonic acid
Other names Sulphanilic acid
Identifiers
CAS number 121-57-3
PubChem 8479
SMILES C1=CC(=CC=C1N)S(=O)(=O)O
InChI InChI=InChI=1/C6H7NO3S/c7-5-
1-3-6(4-2-5)11(8,9)10/h1-4H,
7H2,(H,8,9,10)/f/h8H
Properties
Molecular formula C6H7NO3S
Molar mass 173.19
Melting point

288 °C, 561 K, 550 °F

Solubility in water >20 g/l
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Sulphanilic acid (4-aminobenzene sulfonic acid ) is a colourless crystalline solid produced from aniline.[1]

It readily forms sulpha drugs. [1]

It is a zwitter ion with an unusual high melting point.

References

  1. ^ a b "Sulphanilic acid". A Dictionary of Chemistry. Oxford University Press, 2000. Oxford Reference Online. Oxford University Press.
 
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