Metanilic acid

Metanilic acid
Names
	Preferred IUPAC name 3-Aminobenzene-1-sulfonic acid
	Other names 3-Aminobenzenesulfonic acid; m-Anilinesulfonic acid
Identifiers
CAS Number	121-47-1;
3D model (JSmol)	Interactive image;
ChemSpider	8161;
ECHA InfoCard	100.004.067
EC Number	204-473-6204-473-6;
PubChem CID	8474;
UNII	OT03NUM20P ;
UN number	2585
CompTox Dashboard (EPA)	DTXSID6024462 ;
	InChI InChI=1S/C6H7NO3S/c7-5-2-1-3-6(4-5)11(8,9)10/h1-4H,7H2,(H,8,9,10);
	SMILES Nc1cccc(S(=O)(=O)O)c1;
Properties
Chemical formula	C6H7NO3S
Molar mass	173.19 g·mol−1
Appearance	Beige powder
Density	1.69
Melting point	>300 °C (lit.)
Solubility in water	Less than 1 mg/mL at 22 °C (72 °F)
Acidity (pKa)	3.74 (H2O)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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.

References[edit]

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

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[CRC97-1] 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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