Metanilic acid

Metanilic acid is an isomer of sulfanilic acid with molecular formula C
6H
7NO
3S and molecular weight 173.18968 g/mol.[2][3][4][5] It is a white powder that is slightly soluble in water.

Metanilic acid
Names
Preferred IUPAC name
3-Aminobenzene-1-sulfonic acid
Other names
3-Aminobenzenesulfonic acid
m-Anilinesulfonic acid
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.004.067
EC Number
  • 204-473-6204-473-6
UNII
UN number 2585
  • InChI=1S/C6H7NO3S/c7-5-2-1-3-6(4-5)11(8,9)10/h1-4H,7H2,(H,8,9,10)
  • Nc1cccc(S(=O)(=O)O)c1
Properties
C6H7NO3S
Molar mass 173.19 g·mol−1
Appearance Beige powder
Density 1.69
Melting point >300 °C (lit.)
Less than 1 mg/mL at 22 °C (72 °F)
Acidity (pKa) 3.74 (H2O)[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

See also

References
  1. Haynes, William M., ed. (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. pp. 5–88. ISBN 978-1498754286.
  2. Pubchem. "3-AMINOBENZENESULFONIC ACID - C6H7NO3S - PubChem". NIH.
  3. "Metanilic acid - 121-47-1".
  4. "Metanilic acid".
  5. "METANILIC ACID (3-AMINO-BENZENESULFONIC ACID)".


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