DMDM Hydantoin

DMDM Hydantoin is a formaldehyde-releasing preservative used in many cosmetic and personal care products. It works by slowly releasing small amounts of formaldehyde, which prevents the growth of microbes like bacteria, yeast, and mold. This helps to extend the shelf life of products and protect them from contamination.

BenefitNone 0 / 4

RiskHigh 2.5 / 4

Sensitization i2.5 / 4

Risk of allergic contact dermatitis or immune-based reactions. Fragrance allergens, preservatives, botanicals, and some dyes may score here.

Genotoxic carcinogenic i2.5 / 4

Whether there is evidence or regulatory concern about DNA damage, mutagenicity, or cancer risk.

Irritation i2 / 4

Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.

Rated by SpottyLabs' ingredient methodology, independent of brands.

Things to watch

• Potential for skin irritation and sensitization
• Formaldehyde release can be an allergen

Products with DMDM Hydantoin

Browse all products →

Frequently asked questions

Why is DMDM Hydantoin used in cosmetics?

DMDM Hydantoin is used as a preservative to prevent microbial growth in cosmetic products, ensuring their safety and extending their shelf life. It is effective against a broad spectrum of bacteria, yeasts, and molds.

Is DMDM Hydantoin safe?

While approved for use in cosmetics at certain concentrations, DMDM Hydantoin is a known formaldehyde-releaser and can cause allergic reactions or skin irritation in some individuals, particularly those sensitive to formaldehyde.