Back to Ingredient Dictionary

DMDM Hydantoin

Description

DMDM Hydantoin is a widely used preservative in cosmetics and personal care products. This synthetic compound, chemically known as 1,3-dimethylol-5,5-dimethylhydantoin, functions as a formaldehyde releaser, gradually releasing small amounts of formaldehyde to inhibit microbial growth. Its effectiveness against a broad spectrum of bacteria, yeasts, and molds makes it a valuable ingredient in maintaining product stability and preventing contamination.

Typically used in concentrations ranging from 0.1% to 1%, DMDM Hydantoin is water-soluble and performs well in aqueous formulations. It is particularly effective in products with a pH range of 3-9, making it versatile for various skincare and haircare applications. The ingredient's ability to extend shelf life without compromising product efficacy has contributed to its popularity among formulators.

While generally considered safe when used as directed, DMDM Hydantoin has faced scrutiny due to its formaldehyde-releasing properties. Some individuals may experience skin irritation or allergic reactions, particularly those with formaldehyde sensitivity. Regulatory bodies, including the FDA and EU Cosmetics Regulation, have established guidelines for its use, ensuring consumer safety while recognizing its benefits in product preservation.