p-Toluic acid
Appearance
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Names | |||
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IUPAC name
4-Methylbenzoic acid
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Other names
para-toluic acid
p-toluic acid para-methylbenzoic acid p-methylbenzoic acid toluene-4-carboxylic acid crithminic acid | |||
Identifiers | |||
3D model (JSmol)
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ChEBI | |||
ChEMBL | |||
ChemSpider | |||
ECHA InfoCard | 100.002.549 | ||
EC Number |
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KEGG | |||
CompTox Dashboard (EPA)
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Properties | |||
C8H8O2 | |||
Molar mass | 136.150 g·mol−1 | ||
Appearance | Crystalline solid | ||
Density | 1.06g/mL | ||
Melting point | 180 to 181 °C (356 to 358 °F; 453 to 454 K)[1] | ||
Boiling point | 274 to 275 °C (525 to 527 °F; 547 to 548 K)[1] | ||
Sparingly soluble in hot water | |||
Thermochemistry | |||
Std enthalpy of
formation (ΔfH⦵298) |
-429 kJ/mol | ||
Std enthalpy of
combustion (ΔcH⦵298) |
3862 kJ/mol | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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p-Toluic acid (4-methylbenzoic acid) is a substituted benzoic acid with the formula CH3C6H4COOH. It is an intermediate in some industrial processes for the oxidation of p-xylene to terephthalic acid which is used in the manufacture of polyethylene terephthalate. It is a white crystalline solid that is practically insoluble in water, but soluble in acetone.
See also
References
- ^ a b Merck Index, 12th Edition, 9673