☣️ UN 1745 • CLASS 5
UN 1745 — Bromine pentafluoride
Placard: Oxidizer. ERG Guide 144. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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UN 1745 Quick Details
UN 1745
Product name: Bromine pentafluoride
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 144 (check current ERG)
Initial isolation: ERG 144: Initial isolation 100m in all directions. Protective action distance: day 0.5km, night 1.3km for large spills. Evacuate downwind areas.
Common Hazards of UN 1745
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- React vigorously and/or explosively with water.
- Produce toxic and/or corrosive substances on contact with water.
- Flammable/toxic gases may accumulate in tanks and hopper cars.
- Some may produce flammable hydrogen gas upon contact with metals.
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- TOXIC; inhalation or contact with vapor, substance, or decomposition products may cause severe injury
Chemical Identity & Physical Properties
| Also known as | Bromine(V) fluorideBrF5Pentafluorobromine |
| CAS Number | 7789-30-2 |
| Appearance | Colorless to pale yellow fuming liquid with a pungent, irritating odor. Highly reactive and corrosive. |
| Flash Point | Not applicable (strong oxidizer) |
| Boiling Point | 41C (106F) |
| Vapor Density | 6.9 (much heavier than air) |
| Water Reactivity | Reacts violently with water producing toxic and corrosive hydrogen fluoride and hydrogen bromide fumes. Do not use water directly on material. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1745
Extinguishing Media
Dry chemical, dry sand, or soda ash only. Do not use water, foam, or CO2.
PPE Requirements
⚠️ Level A required; full encapsulating suit with SCBA. Severe corrosive hazard to skin, eyes, and respiratory system.
Isolation & Evacuation
ERG 144: Initial isolation 100m in all directions. Protective action distance: day 0.5km, night 1.3km for large spills. Evacuate downwind areas.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 144).
First Actions for a UN 1745 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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UN 1745 — Bromine pentafluorideHAZMAT RADIO NOTE — UN 1745
Product: Bromine pentafluoride
Class 5 / Oxidizer / ERG 144
PPE: Level A required; full encapsulating suit with SCBA. Severe corrosive hazard to skin, eyes, and respiratory system.
ISOLATION: ERG 144: Initial isolation 100m in all directions. Protective action distance: day 0.5km, night 1.3km for large spills. Evacuate downwind areas.
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 1745 — Bromine pentafluoride
Class: 5 | Placard: Oxidizer | ERG Guide: 144
Appearance: Colorless to pale yellow fuming liquid with a pungent, irritating odor. Highly reactive and corrosive.
Water Reactivity: Reacts violently with water producing toxic and corrosive hydrogen fluoride and hydrogen bromide fumes. Do not use water directly on material.
Extinguishing: Dry chemical, dry sand, or soda ash only. Do not use water, foam, or CO2.
PPE: Level A required; full encapsulating suit with SCBA. Severe corrosive hazard to skin, eyes, and respiratory system.
Isolation: ERG 144: Initial isolation 100m in all directions. Protective action distance: day 0.5km, night 1.3km for large spills. Evacuate downwind areas.
— Key Hazards —
• May ignite combustibles (wood, paper, oil, clothing, etc.).
• React vigorously and/or explosively with water.
• Produce toxic and/or corrosive substances on contact with water.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/1745 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1745 Bromine pentafluoride Cls5 ERG144 | ERG 144: Initial isolation 100m in all directions. Protective action distance: d | allfirefighter.com/hazmat/un/1745SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/1745
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Frequently Asked Questions about UN 1745
May ignite combustibles (wood, paper, oil, clothing, etc.). React vigorously and/or explosively with water. Produce toxic and/or corrosive substances on contact with water. Flammable/toxic gases may accumulate in tanks and hopper cars. Some may produce flammable hydrogen gas upon contact with metals. Containers may explode when heated. Runoff may create fire or explosion hazard. TOXIC; inhalation or contact with vapor, substance, or decomposition products may cause severe injury
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level A required; full encapsulating suit with SCBA. Severe corrosive hazard to skin, eyes, and respiratory system.
Water reactivity: Reacts violently with water producing toxic and corrosive hydrogen fluoride and hydrogen bromide fumes. Do not use water directly on material.. Recommended extinguishing: Dry chemical, dry sand, or soda ash only. Do not use water, foam, or CO2..
ERG Guide 144 recommendation: ERG 144: Initial isolation 100m in all directions. Protective action distance: day 0.5km, night 1.3km for large spills. Evacuate downwind areas.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 144 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles.
This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.