P-Toluic acid

p-Toluic acid
Names
	Preferred 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 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	3904552
ChEBI	CHEBI:36635;
ChEMBL	ChEMBL21708 ;
ChemSpider	7190 ;
ECHA InfoCard	100.002.549
EC Number	202-803-3;
KEGG	C01454 ;
PubChem CID	7470;
RTECS number	XU1575000;
UNII	A26GBX5SSV ;
CompTox Dashboard (EPA)	DTXSID6021618 ;
	InChI InChI=1S/C8H8O2/c1-6-2-4-7(5-3-6)8(9)10/h2-5H,1H3,(H,9,10) Key: LPNBBFKOUUSUDB-UHFFFAOYSA-N ; InChI=1/C8H8O2/c1-6-2-4-7(5-3-6)8(9)10/h2-5H,1H3,(H,9,10) Key: LPNBBFKOUUSUDB-UHFFFAOYAB;
	SMILES O=C(O)c1ccc(cc1)C;
Properties
Chemical formula	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)
Boiling point	274 to 275 °C (525 to 527 °F; 547 to 548 K)
Solubility in water	Sparingly soluble in hot water
Thermochemistry
Std enthalpy of; formation (ΔfH⦵298)	−429 kJ/mol
Std enthalpy of; combustion (ΔcH⦵298)	3862 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H315, H317, H319, H335
Precautionary statements	P261, P264, P270, P271, P272, P280, P301+P312, P302+P352, P304+P340, P305+P351+P338, P312, P321, P330, P332+P313, P333+P313, P337+P313, P362, P363, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

p-Toluic acid (4-methylbenzoic acid) is a substituted benzoic acid with the formula CH₃C₆H₄CO₂H. It is a white solid that is poorly soluble in water but soluble in acetone. A laboratory route to p-toluic acid involves oxidation of p-cymene with nitric acid.