p-Toluic acid

p-Toluic acid

IUPAC name 4-Methylbenzoic acid
Other names para-toluic acid p-toluic acid para-methylbenzoic acid p-methylbenzoic acid toluene-4-carboxylic acid crithminic acid
Identifiers
CAS number	99-94-5^Y
ChemSpider	7190^Y
EC number	202-803-3
KEGG	C01454^Y
ChEMBL	CHEMBL21708^Y
Jmol-3D images	Image 1
SMILES O=C(O)c1ccc(cc1)C
InChI InChI=1S/C8H8O2/c1-6-2-4-7(5-3-6)8(9)10/h2-5H,1H3,(H,9,10)^Y Key: LPNBBFKOUUSUDB-UHFFFAOYSA-N^Y InChI=1/C8H8O2/c1-6-2-4-7(5-3-6)8(9)10/h2-5H,1H3,(H,9,10) Key: LPNBBFKOUUSUDB-UHFFFAOYAB
Properties
Molecular formula	C₈H₈O₂
Molar mass	136.15 g mol⁻¹
Appearance	Crystalline solid
Melting point	180-181 °C, 453-454 K, 356-358 °F (^[1])
Boiling point	275 °C, 548 K, 527 °F (^[1])
Solubility in water	Sparingly soluble in hot water
Thermochemistry
Std enthalpy of formation Δ_fH^o₂₉₈	-429 kJ/mol
Std enthalpy of combustion Δ_cH^o₂₉₈	3862 kJ/mol
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

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.

References

^ ^a ^b Merck Index, 12th Edition, 9673

p-Toluic acid

See also

References