4-Methylbenzoic acid 1923613 162226328 2007-10-04T12:27:47Z Rifleman 82 1255637 imagesize {{Chembox new | Name = 4-Methylbenzoic acid | ImageFile = 4-Methylbenzoic_acid.png | ImageSize = 80px | ImageName = 4-Methylbenzoic acid | IUPACName = 4-Methylbenzoic acid | Section1 = {{Chembox Identifiers | CASNo = 99-94-5 | EINECS = 202-803-3 | SMILES = CC1=CC=C(C=C1)C(=O)O }} | Section2 = {{Chembox Properties | Formula = CH<sub>3</sub>C<sub>6</sub>H<sub>4</sub>COOH | MolarMass = 136.15 g/mol | MeltingPt = 177-180 °C | BoilingPt = 274-275 °C | Density = }} | Section4 = {{Chembox Thermochemistry | DeltaHf = -429 kJ/mol | DeltaHc = 3862 kJ/mol}} }} '''4-Methylbenzoic acid''', also known as '''''p''-toluic acid''' or crithminic acid (''obsolete'') is a substituted [[benzoic acid]]. It is an intermediate in some industrial processes for the oxidation of [[p-Xylene|p-xylene]] to [[terephthalic acid]] which is used in the manufacture of [[Polyethylene terephthalate|PET]]. It is a white crystalline solid that is practically insoluble in water, but soluble in [[acetone]]. ==See also== *[[o-Toluic acid]] *[[m-Toluic acid]] ==References== {{Unreferenced|date =September 2007}} <references/> {{DEFAULTSORT:Methylbenzoic acid, 4-}} [[Category:Benzoic acids]] [[Category:Aromatic compounds]] {{aromatic-stub}} [[lv:Toluilskābe]]