2-BROMO-2-NITROPROPANE-1,3-DIOL is graded D** (High Concern) by Expert·ING, based on COSING regulatory data. It is restricted under Sephora Clean (Prohibited).
2-BROMO-2-NITROPROPANE-1,3-DIOL
Bronopol
Safety grade: D**
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.
Bronopol is used as a preservative in cosmetic formulations to extend shelf life and keep products safe by stopping the growth of bacteria, yeast, and mold.
Graded using: COSING.
- Health Canada — Restricted
- Sephora Clean — Prohibited
- EU COSING — Restricted use
Last verified: June 9, 2026
Safer alternatives to 2-BROMO-2-NITROPROPANE-1,3-DIOL
- POTASSIUM SORBATE — Grade B. Broad-spectrum preservative that inhibits bacteria, yeast, and mold growth.
- PHENOXYETHANOL — Grade B**. Broad-spectrum preservative effective against bacteria, yeast, and mold.
- CHLORPHENESIN — Grade B. Antimicrobial preservative that prevents bacterial and mold growth in formulations.
- SORBIC ACID — Grade B. Broad-spectrum preservative that inhibits bacteria, yeast, and mold growth.
- BENZOIC ACID — Grade C**. Preservative that inhibits growth of bacteria, yeast, and mold.
Other Preservative ingredients
- SODIUM BENZOATE — Grade C
- BENZYL ALCOHOL — Grade C**
- METHYLISOTHIAZOLINONE — Grade C
- METHYLPARABEN — Grade C
- SALICYLIC ACID — Grade C**