Methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate（Cat No.:L039055）is a synthetic antioxidant compound featuring a sterically hindered phenol group and an ester-functionalized propionic acid side chain. The 3,5-di-tert-butyl-4-hydroxyphenyl moiety provides strong radical-scavenging ability, while the methyl ester enhances solubility and stability. This molecule is commonly used in polymer stabilization, protecting plastics and rubbers from oxidative degradation. Its bulky tert-butyl groups shield the reactive hydroxyl group, prolonging antioxidant activity. It also serves as an intermediate in pharmaceutical and material chemistry, contributing to the development of durable, oxidation-resistant formulations and high-performance materials.