☣️ UN 1716 • CLASS 8
UN 1716 — Acetyl bromide
Placard: Corrosive. ERG Guide 156. 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.
Acetyl bromide is a highly reactive and corrosive substance that requires careful handling and emergency response. It is a colorless to pale yellow fuming liquid with a pungent, irritating odor.
Hazard overview: Acetyl bromide is a combustible material that may burn but does not ignite readily. It reacts with water, releasing corrosive hydrogen bromide and acetic acid vapors.
Response guidance: In case of emergency, isolate the spill area immediately for at least 50m in all directions. Use dry chemical, CO2, or dry sand to extinguish fires, avoiding water or foam directly on the liquid.
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UN 1716 Quick Details
UN 1716
Product name: Acetyl bromide
DOT Class: 8
Placard type: Corrosive
ERG Guide: 156 (check current ERG)
Initial isolation: ERG 156: isolate spill/leak area immediately for at least 50m in all directions; for large spills consider initial downwind evacuation for at least 300m
Common Hazards of UN 1716
- Combustible material: may burn but does not ignite readily.
- Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
- When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapors may travel to source of ignition and flash back.
- Corrosives in contact with metals may evolve flammable hydrogen gas.
- Containers may explode when heated or if contaminated with water.
- TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
Chemical Identity & Physical Properties
Acetyl bromide is a colorless to pale yellow fuming liquid with a pungent, irritating odor.
| Also known as | Ethanoyl bromideAcetic acid bromideBromoacetyl |
| CAS Number | 506-96-7 |
| Appearance | Colorless to pale yellow fuming liquid with a pungent, irritating odor. Fumes in moist air due to hydrolysis. |
| Flash Point | Not applicable (reacts with moisture) |
| Boiling Point | 76C (169F) |
| Vapor Density | 4.3 (heavier than air) |
| Water Reactivity | Reacts violently with water releasing corrosive hydrogen bromide (HBr) and acetic acid vapors; 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 1716
Extinguishing Media
Dry chemical, CO2, dry sand; do not use water or foam directly on liquid
PPE Requirements
⚠️ Level B minimum with full face SCBA; chemical-resistant suit required due to corrosive fumes and liquid
Level B minimum PPE with full face SCBA and chemical-resistant suit required due to corrosive fumes and liquid.
Isolation & Evacuation
ERG 156: isolate spill/leak area immediately for at least 50m in all directions; for large spills consider initial downwind evacuation for at least 300m
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 156).
First Actions for a UN 1716 Incident
- 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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📋 Copy & Share Field Card
UN 1716 — Acetyl bromideHAZMAT RADIO NOTE — UN 1716
Product: Acetyl bromide
Class 8 / Corrosive / ERG 156
PPE: Level B minimum with full face SCBA; chemical-resistant suit required due to corrosive fumes and liquid
ISOLATION: ERG 156: isolate spill/leak area immediately for at least 50m in all directions; for large spills consider initial downwind evacuation for at least 300m
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 1716 — Acetyl bromide
Class: 8 | Placard: Corrosive | ERG Guide: 156
Appearance: Colorless to pale yellow fuming liquid with a pungent, irritating odor. Fumes in moist air due to hydrolysis.
Water Reactivity: Reacts violently with water releasing corrosive hydrogen bromide (HBr) and acetic acid vapors; do not use water directly on material
Extinguishing: Dry chemical, CO2, dry sand; do not use water or foam directly on liquid
PPE: Level B minimum with full face SCBA; chemical-resistant suit required due to corrosive fumes and liquid
Isolation: ERG 156: isolate spill/leak area immediately for at least 50m in all directions; for large spills consider initial downwind evacuation for at least 300m
— Key Hazards —
• Combustible material: may burn but does not ignite readily.
• Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
• When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
— First Actions —
• 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
SOURCE: allfirefighter.com/hazmat/un/1716 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1716 Acetyl bromide Cls8 ERG156 | ERG 156: isolate spill/leak area immediately for at least 50m in all directions; | allfirefighter.com/hazmat/un/1716SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/acetyl-bromide-un-1716
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Frequently Asked Questions about UN 1716
Yes, Acetyl bromide is a combustible material that may burn but does not ignite readily.
Acetyl bromide reacts violently with water, releasing corrosive hydrogen bromide and acetic acid vapors.
Level B minimum PPE with full face SCBA and chemical-resistant suit required due to corrosive fumes and liquid.
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.