m-Toluic acid
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| Template:Longitem | C8H8O2 |
| Molar mass | 136.15 g/mol |
| Density | 1.05 g/cm3, solid |
| Melting point | Template:Chembox CalcTemperatures |
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| Acidity (pKa) | 4.27 (in water)[2] |
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m-Toluic acid, (IUPAC: 3-methylbenzoic acid), is an aromatic carboxylic acid, with formula (CH3)C6H4(COOH). It is an isomer of p-toluic acid and o-toluic acid.
Preparation
m-Toluic acid is often prepared in the laboratory by refluxing m-xylene with either nitric acid or potassium permanganate, oxidizing one of the methyl groups to COOH.
Uses
It serves, among other purposes, as a precursor to DEET (N,N-diethyl-m-toluamide), the well-known insect repellent.[3][4]
References
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