Snapshot
- Overview
- A preservative that can release formaldehyde and may irritate skin.
- Category
- Preservative
- Type
- Preservative
Dmdm Hydantoin
DMDM Hydantoin is a formaldehyde-donor preservative found in a variety of cosmetic and personal care products. It limits microbial growth in formulas, though it raises irritation concerns and faces restrictions in some regions.
Like this ingredient?
Our take
Is Dmdm Hydantoin a Good Ingredient?
Poor: While it is an effective preservative, it releases small amounts of formaldehyde, which increases the risk of irritation and sensitization; several regions place limits or labeling requirements, lowering its suitability compared with alternatives.
What it does
Skin Benefits
Helps protect products from microbial contamination, extending usable life. Some individuals may experience sensitivity, so it may not suit all users.
Where you'll find it
Uses in Skincare & Cosmetics
Frequently used in rinse-off formats like shampoos, conditioners, and body washes. Also appears in gels and lotions, though many brands opt for alternative systems in leave-on products.
Before you use it
Safety
Carries a notable risk of irritation and allergic contact dermatitis, particularly for sensitive skin or with prolonged leave-on exposure. In the EU and some regions it is restricted by concentration limits and requires “contains formaldehyde” labeling above a free-formaldehyde threshold. Users prone to sensitivity may prefer to avoid it, especially in leave-on products.
Products with Dmdm Hydantoin
