PROPANE-1

AKA: Bronopol, 52-51-7, 2-Bromo-2-nitro-1, 3-propanediol, 2-Bromo-2-nitropropane-1, 3-diol, Bronosol, Bronocot, Bronotak, Bronidiol, Bronopolu, Lexgard bronopol
Synthetic
Preservative
Not Clean
1,3-Propanediol, 2-bromo-2-nitro-
Solubility greater than or equal to 100 mg/mL at 63 °F (NTP, 1992)
Mol. Weight
199.99
CAS #
52-51-7
State
2-bromo-2-nitropropane-1,3-diol appears as white crystals. Ignite easily and burn readily. May detonate under strong shock. Decomposes when heated, evolving toxic gases. Toxic by skin absorption, inha
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.
EWG
7
CIR
Pregnancy
Regulatory Status
EUpermitted
JAPANpermitted
CANADApermitted
Regulatory Agencies
The paper trail
🔬Peer-reviewed1 paper
⚖️Regulatory0 listings
🛡️Safety-assessed1 review
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: PubChem · CosIng · EWG