UN 3241 — 2-Bromo-2-nitropropane-1, 3-diol
Placard: Flammable Solid. ERG Guide 133. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3241 is 2-Bromo-2-nitropropane-1, 3-diol, a flammable/combustible organic solid assigned to ERG Guide 133. Dust, heat decomposition and toxic gases are key concerns.
Hazard overview: Flammable/combustible nitro-brominated organic solid; may ignite from heat, sparks or friction. Dust can irritate eyes, skin and respiratory tract and may burn rapidly when dispersed. Decomposes when heated, producing nitrogen oxides, hydrogen bromide and other toxic/irritating gases.
Response guidance: For UN 3241, isolate the area, avoid exposure and use SCBA where dust, vapor, smoke or fire is present. Verify exact controls with SDS and ERG 133.
Firefighter training notes: Training for UN 3241 should emphasize product verification, SCBA use, dust/vapor control, decontamination, runoff containment and SDS/package review. Use ERG 133, SDS and local SOP.
Regulatory context: 2-Bromo-2-nitropropane-1, 3-diol is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, formulation, package type and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: 2-Bromo-2-nitropropane-1, 3-diol should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 3241 Quick Details
Common Hazards of UN 3241
- Flammable/combustible nitro-brominated organic solid; may ignite from heat, sparks or friction.
- Dust can irritate eyes, skin and respiratory tract and may burn rapidly when dispersed.
- Decomposes when heated, producing nitrogen oxides, hydrogen bromide and other toxic/irritating gases.
- Water soluble; aqueous solutions may slowly decompose and contaminate runoff.
- Skin or eye contact can cause irritation or burns depending on concentration and exposure.
- Containers may rupture or fail when heated.
- Avoid dust generation, incompatible contamination and unnecessary handling.
Chemical Identity & Physical Properties
White to off-white crystalline powder or solid with a faint characteristic odor. Stable at room temperature but decomposes upon heating.
| Also known as | Bronopol2-Bromo-2-nitro-1,3-propanediolBronotakLexgard bronopolBNPD |
| CAS Number | 52-51-7 |
| Appearance | White to off-white crystalline powder or solid with a faint characteristic odor. Stable at room temperature but decomposes upon heating. |
| Flash Point | Not applicable (decomposes before melting) |
| Boiling Point | Not applicable (decomposes at approximately 130-140C) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water; no violent reaction but may decompose slowly in aqueous solution releasing formaldehyde |
Fireground Response Guidance — UN 3241
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for dust, smoke or fire. Wear chemical-resistant gloves, eye/face protection and protective clothing; avoid dust and skin contact.
Isolation & Evacuation
First Actions for a UN 3241 Incident
- Call 911 and the emergency response number on the shipping paper, if available.
- Keep unauthorized personnel away and establish incident command.
- Stay upwind, uphill and upstream.
- Avoid breathing vapor, dust, mist, smoke or fumes and avoid skin or eye contact.
- Do not touch damaged containers, spilled material or residue without proper training and PPE.
- Prevent contaminated runoff, dust, liquid and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 133, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3241 — 2-Bromo-2-nitropropane-1, 3-diolUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.