5-Bromo-5-Nitro-1,3-Dioxane
molecular structure · PubChem
AKA: 30007-47-7, Bronidox, 5-Bromo-5-nitro-m-dioxane, M-DIOXANE, 5-Brom-5-nitro-1, MICROCIDE I
Synthetic
Preservative
Not Clean
Bronidox is an organobromide that is a nitrobromo derivative of dioxane. It is used as a stabilizer, surfacant, bactericide, and a preservative in immunology and cosmetics. It is corrosive to metals. Bronidox has been used in cosmetics since the mid-1970s as preservative for shampoos and foam baths.
Formula
C4H6BrNO4
Mol. Weight
212.00
CAS #
30007-47-7
Form
Powder
Functions
Preservative
Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.
Preserves Formula
Prevents microbial growth
Traditional Use
Synthetic preservative developed in the late 20th century for use in cosmetic and personal care products. Created to provide broad-spectrum antimicrobial protection in formulations.
EWG
4
CIR
Safe as used
Pregnancy
Caution
CIR Safety Findings
medical-approval
all-shades-safe
Concentration Guide
0.1%
0%0%
Reg. Limit
EU regulatory limit: 0.1%. Source: EU Cosmetics Regulation (EC) 1223/2009, Annex V (Preservatives), Entry 20.
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR