Back to Ingredient Dictionary

METHYLENE DI-T-BUTYLCRESOL

Description

Methylene di-t-butylcresol, also known as Metilox or 2,2'-Methylene-bis(6-tert-butyl-p-cresol), is a potent synthetic antioxidant used in skincare and cosmetic formulations. This white crystalline compound is prized for its ability to stabilize various cosmetic ingredients, particularly oils and fats, preventing oxidation and extending product shelf life. Its molecular structure, featuring two hindered phenol groups, allows it to effectively neutralize free radicals and inhibit lipid peroxidation.

In skincare applications, methylene di-t-butylcresol primarily functions as a preservative and antioxidant. It helps maintain the integrity of formulations containing unsaturated fatty acids, vitamins, and other oxidation-sensitive components. This ingredient is typically used in concentrations ranging from 0.01% to 0.1%, depending on the specific formulation requirements. Its efficacy in low concentrations makes it a cost-effective option for formulators.

While methylene di-t-butylcresol is generally considered safe for use in cosmetics, it may cause skin irritation in some individuals, particularly at higher concentrations. As with any synthetic antioxidant, its use should be carefully considered in formulations intended for sensitive skin. Regulatory bodies, including the FDA and EU Cosmetics Regulation, have established guidelines for its safe use in personal care products.