5-BROMO-5-NITRO-1,3-DIOXANE is graded C** (Moderate) by Expert·ING, based on COSING regulatory data. It is restricted under Health Canada (Restricted).
5-BROMO-5-NITRO-1,3-DIOXANE
Bronidox
Safety grade: C**
This preservative is permitted in EU cosmetics with a maximum concentration limit and usage restrictions under EU Cosmetics Regulation (EC) No 1223/2009. To be sold legally in the EU or UK, a product must meet these conditions.
This ingredient is used in cosmetic products as a preservative to extend shelf life and keep the product safe by stopping the growth of microorganisms that could cause spoilage or skin infections.
Graded using: COSING.
- Health Canada — Restricted
- EU COSING — Restricted use
Last verified: June 9, 2026
Safer alternatives to 5-BROMO-5-NITRO-1,3-DIOXANE
- PHENOXYETHANOL — Grade B**. Broad-spectrum preservative that prevents microbial growth in cosmetics.
- SORBIC ACID — Grade B. Food-grade preservative that inhibits bacteria and mold growth.
- CHLORPHENESIN — Grade B. Antimicrobial preservative used to prevent product spoilage.
- DEHYDROACETIC ACID — Grade B. Preservative that extends shelf life by inhibiting microbial growth.
Other Preservative ingredients
- SODIUM BENZOATE — Grade C
- BENZYL ALCOHOL — Grade C**
- POTASSIUM SORBATE — Grade B
- BENZOIC ACID — Grade C**
- METHYLISOTHIAZOLINONE — Grade C
- METHYLPARABEN — Grade C
- SALICYLIC ACID — Grade C**