UN 1744 — Bromine, solution (Inhalation Hazard Zone A)
Placard: Corrosive. ERG Guide 154. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1744 is Bromine, solution (Inhalation Hazard Zone A), a corrosive toxic inhalation hazard material assigned to ERG Guide 154. It can release heavy bromine vapor that may cause severe respiratory injury and corrosive burns.
Hazard overview: UN 1744 presents toxic inhalation, corrosive liquid and heavy-vapor hazards. Vapor can collect in low areas, water may increase vapor evolution, and runoff can spread corrosive bromine contamination.
Response guidance: For a UN 1744 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 154. Establish incident command, isolate the area, stay upwind, prevent incompatible contact, control runoff and choose entry or fire-control actions based on monitoring, SDS and local SOP.
Firefighter training notes: Training for UN 1744 should emphasize toxic inhalation hazard zone response, heavy bromine vapor, Level A entry, vapor control, runoff containment and downwind protective actions. Use ERG 154, Table 1, SDS and incident command.
Regulatory context: Bromine, solution (Inhalation Hazard Zone A) is regulated as a hazardous material for transportation and emergency response purposes. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by concentration, formulation, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Bromine, solution (Inhalation Hazard Zone A) should be stored in compatible corrosion-resistant containers in a secure, cool, well-ventilated toxic/corrosive area away from organics, reducing agents, reactive metals and heat. Secondary containment and vapor control should follow SDS.
UN 1744 Quick Details
Common Hazards of UN 1744
- TOXIC Inhalation Hazard Zone A and CORROSIVE; inhalation may cause severe or fatal respiratory injury.
- Heavy reddish-brown vapors are much heavier than air and may collect in low or confined areas.
- Liquid and vapor can cause severe burns to eyes, skin and respiratory tissue.
- Non-flammable, but bromine is a strong oxidizing/corrosive material and may react with metals, organics or reducing agents.
- Water contact may increase vapor evolution and create corrosive/toxic runoff.
- Fire may produce irritating, corrosive and/or toxic gases.
- Containers may rupture or fail when heated.
Chemical Identity & Physical Properties
Heavy, dark reddish-brown fuming liquid with a sharp, pungent, irritating odor. Corrosive to most metals and organic materials.
| Also known as | Bromine liquidElemental bromineDibromineMolecular bromine |
| CAS Number | 7726-95-6 |
| Appearance | Heavy, dark reddish-brown fuming liquid with a sharp, pungent, irritating odor. Corrosive to most metals and organic materials. |
| Flash Point | Not applicable (non-flammable) |
| Boiling Point | 58.8C (137.8F) |
| Vapor Density | 5.5 (much heavier than air) |
| Water Reactivity | Slightly soluble in water; produces hypobromous acid. Avoid direct water contact as it increases vapor evolution. |
Fireground Response Guidance — UN 1744
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA and chemical protective clothing selected by hazmat specialists. Level A may be needed for close entry, unknown concentrations or liquefied gas/vapor contact because toxic, corrosive and heavy-vapor hazards may be severe.
Isolation & Evacuation
First Actions for a UN 1744 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Avoid low areas, basements, trenches and confined spaces where heavy vapor or gas may accumulate.
- Avoid breathing vapors, fumes, dust, mist or gas and avoid skin or eye contact.
- Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
- Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
- Isolate the spill or leak area and expand the perimeter if vapor, gas, dust, fire involvement, water reaction or unknown concentration is present.
- Use ERG Guide 154, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1744 — Bromine, solution (Inhalation Hazard ZonUse 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.