Back to Ingredient Dictionary

Sorbic Acid

Description

Sorbic acid is a naturally occurring organic compound widely used as a preservative in cosmetics and skincare products. This white, crystalline solid is derived from berries of the rowan tree but is often synthesized for commercial use. With the molecular formula C6H8O2, sorbic acid functions as an effective antimicrobial agent, inhibiting the growth of molds, yeasts, and certain bacteria.

In skincare formulations, sorbic acid typically appears at concentrations between 0.1% and 0.2%. Its primary role is to extend product shelf life by preventing microbial contamination. Unlike some preservatives, sorbic acid is generally well-tolerated by most skin types and has a low risk of irritation or sensitization.

Beyond its preservative properties, sorbic acid exhibits mild keratolytic effects, potentially aiding in gentle exfoliation. It has a pH of around 4.76, contributing to the maintenance of skin's natural acidic environment. Sorbic acid is often used in conjunction with other preservatives for broad-spectrum protection against microorganisms.

While effective, sorbic acid's preservative action can be pH-dependent, working optimally in slightly acidic conditions. It is approved for use in cosmetics by regulatory bodies worldwide, including the FDA and EU Commission.