White or light yellow crystalline powder. Melting point 179-182 ° C. Boiling point 274-275 ° C. Easy to dissolve in methanol and ether, difficult to dissolve in hot water, and can evaporate with water vapor; Phthalic acid is obtained through oxidation and can be used as an intermediate in pharmaceuticals, photosensitive materials, pesticides, and organic pigments. It is mainly used to manufacture hemostatic aromatic acid, p-acrylonitrile, p-toluenoyl chloride, photosensitive materials, etc.
English alias 4-Methylbenzoic acid; P-Toluylic acid; Crithmic acid; Toluenecarboxylic acid; P-Toluic acid
Molecular formula: C8H8O2
Molecular weight: 136.15
CAS number: 99-94-5
EINECS 202-803-3
Melting point 179-182 ° C. Boiling point 274-275 ° C.
Water solubility<0.1 g/100 mL at 19 ° C.
Flash point: 124.7 ° C
Steam pressure: 0.00248mm Hg at 25 ° C
Solubility: Easily soluble in methanol, ethanol, and ether, but difficult to dissolve in hot water.
Performance and application: Easy to dissolve in methanol and ether, difficult to dissolve in hot water, and can evaporate with water vapor; Phthalic acid is obtained through oxidation and can be used as an intermediate in pharmaceuticals, photosensitive materials, pesticides, and organic pigments. It is mainly used to manufacture hemostatic aromatic acid, p-acrylonitrile, p-toluyl chloride, photosensitive materials, etc