3-(4-Methylbenzoyl)propionic acid (CAS NO.4619-20-9) is also called 3-(p-Toluoyl)propionic acid ; 4-(4-Methylphenyl)-4-oxobutyric acid ; 4-(4-Methylphenyl)-4-oxobutanoic acid. 3-(4-Methylbenzoyl)propionic acid (CAS NO.4619-20-9) is an organic carboxylic acid. It is white to light beige crystalline powder.