DMDM HYDANTOIN is graded C (Moderate) by Expert·ING, based on COSING, FDA regulatory data. It is restricted under Sephora Clean (Prohibited).
DMDM HYDANTOIN
Safety grade: C
This preservative is permitted in EU cosmetics up to a maximum concentration under EU Cosmetics Regulation (EC) No 1223/2009. To be sold legally in the EU or UK, a product must stay within this limit.
This ingredient preserves cosmetic products by inhibiting microbial growth, extending shelf life and maintaining product safety and stability.
Graded using: COSING, FDA.
- Sephora Clean — Prohibited
- EU COSING — Restricted use
Last verified: June 9, 2026
Safer alternatives to DMDM HYDANTOIN
- PHENOXYETHANOL — Grade B**. Broad-spectrum preservative that inhibits microbial growth like DMDM Hydantoin.
- POTASSIUM SORBATE — Grade B. Classic preservative system that prevents bacterial and fungal contamination in cosmetics.
- DEHYDROACETIC ACID — Grade B. Antimicrobial preservative that extends shelf life by inhibiting microbial proliferation.
- SORBIC ACID — Grade B. Natural preservative that prevents mold and bacterial growth in formulations.
- SODIUM DEHYDROACETATE — Grade B. Broad-spectrum preservative effective against bacteria and fungi in cosmetic products.
Other Preservative ingredients
- SODIUM BENZOATE — Grade C
- BENZYL ALCOHOL — Grade C**
- BENZOIC ACID — Grade C**
- METHYLISOTHIAZOLINONE — Grade C
- METHYLPARABEN — Grade C
- SALICYLIC ACID — Grade C**