O-Toluic acid

o-Toluic acid, also 2-methylbenzoic acid, is an aromatic carboxylic acid, with formula (CH₃)C₆H₄(COOH). It is an isomer of p-toluic acid and m-toluic acid. When purified and recrystallized, o-toluic acid forms needle-shaped crystals. o-Toluic acid was first noticed by Sir William Ramsay, credited discoverer of the noble gases and winner of the 1904 Nobel Prize in Chemistry.

o-Toluic acid^[1]

Names
Preferred IUPAC name 2-Methylbenzoic acid
Other names ortho-toluic acid
Identifiers
CAS Number	118-90-1 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:36632 N
ChEMBL	ChEMBL114957 Y
ChemSpider	8070 Y
ECHA InfoCard	100.003.896
KEGG	C07215 Y
PubChem CID	8373
UNII	9NR3033Y0U Y
CompTox Dashboard (EPA)	DTXSID6026161
InChI InChI=1S/C8H8O2/c1-6-4-2-3-5-7(6)8(9)10/h2-5H,1H3,(H,9,10) Y Key: ZWLPBLYKEWSWPD-UHFFFAOYSA-N Y InChI=1/C8H8O2/c1-6-4-2-3-5-7(6)8(9)10/h2-5H,1H3,(H,9,10) Key: ZWLPBLYKEWSWPD-UHFFFAOYAI
SMILES O=C(O)c1ccccc1C
Properties
Chemical formula	C8H8O2
Molar mass	136.2 g/mol
Density	1.06 g/cm3
Melting point	104 to 105 °C (219 to 221 °F; 377 to 378 K)
Boiling point	259 °C (498 °F; 532 K)
Magnetic susceptibility (χ)	−80.83·10−6 cm3/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

o-Toluic acid is prepared by oxidation of o-xylene with nitric acid.^[2]