DMDM Hydantoin ●
TL;DR. This ingredient is a preservative used mainly in water-based formulas to control bacteria, yeast, and mold. It is valued for broad-spectrum activity at low use levels and compatibility with many shampoos, conditioners, lotions, and washes.
What does DMDM Hydantoin do in a cosmetic formula?
This ingredient is a preservative used mainly in water-based formulas to control bacteria, yeast, and mold. It is valued for broad-spectrum activity at low use levels and compatibility with many shampoos, conditioners, lotions, and washes.
Is DMDM Hydantoin clean?
Clean-beauty frameworks commonly flag this ingredient because it preserves by releasing small amounts of formaldehyde, which creates allergen and sensitization concerns for some users. It appears on many restricted lists and is not a low-friction choice for sensitive-skin positioning.
Is DMDM Hydantoin sustainable?
This material is synthetic and typically derived from petrochemical feedstocks. It is not known for strong bioaccumulation concerns, but its formaldehyde-release profile and synthetic route create environmental and clean-standard friction.
Is DMDM Hydantoin COSMOS-approved?
It is not permitted under COSMOS-natural or COSMOS-organic standards as a cosmetic preservative. From a Green Chemistry lens, it scores poorly because it relies on formaldehyde-release chemistry rather than a more benign preservation pathway.
How does DMDM Hydantoin work chemically?
The molecule is a nitrogen-containing heterocycle bearing hydroxymethyl groups that slowly liberate formaldehyde in aqueous systems. Typical use levels are about 0.1% to 0.6%, with best performance across mildly acidic to neutral pH, and release rate can increase with heat and storage time.
Last updated 2026-05-13