☣️ UN 1647 • CLASS 6
UN 1647 — Methyl bromide and ethylene dibromide mixture, liquid
Placard: Toxic. ERG Guide 151. 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.
Methyl bromide and ethylene dibromide mixture is a clear to pale yellow liquid with a chloroform-like or sweet odor. It is denser than water and will sink.
Hazard overview: Methyl bromide and ethylene dibromide mixture is highly toxic and may be fatal if inhaled, ingested, or absorbed through skin. Avoid any skin contact to prevent exposure.
Response guidance: In case of emergency, use water spray, dry chemical, or CO2 to extinguish fires. Isolate spills and evacuate downwind.
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UN 1647 Quick Details
UN 1647
Product name: Methyl bromide and ethylene dibromide mixture, liquid
DOT Class: 6
Placard type: Toxic
ERG Guide: 151 (check current ERG)
Initial isolation: ERG 151: isolate spill 25-50m all directions; initial evacuation 100m in all directions; if fire or large spill, evacuate 800m downwind
Common Hazards of UN 1647
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- Avoid any skin contact.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- Containers may explode when heated.
- Runoff may pollute waterways.
Chemical Identity & Physical Properties
Methyl bromide and ethylene dibromide mixture is a clear to pale yellow liquid with a chloroform-like or sweet odor.
| Also known as | Methyl bromide-ethylene dibromide mixtureBromomethane-dibromoethane mixtureMeBr-EDB mixtureMethyl bromide/EDB blend |
| Appearance | Clear to pale yellow liquid with a chloroform-like or sweet odor. Denser than water and will sink. |
| Flash Point | Not applicable (components are non-flammable) |
| Boiling Point | Variable depending on mixture ratio; methyl bromide component boils at 4C (39F), ethylene dibromide at 131C (268F) |
| Vapor Density | 3.3-6.5 (heavier than air, vapors will collect in low areas) |
| Water Reactivity | No significant reaction with water, but slowly hydrolyzes; very low water solubility |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1647
Extinguishing Media
Water spray, dry chemical, CO2; avoid direct water streams on spills
PPE Requirements
⚠️ Level A required for large spills; SCBA mandatory; full chemical-resistant suit; neoprene or butyl rubber gloves; extremely hazardous vapors
Use Level A PPE with SCBA, full chemical-resistant suit, and neoprene or butyl rubber gloves.
Isolation & Evacuation
ERG 151: isolate spill 25-50m all directions; initial evacuation 100m in all directions; if fire or large spill, evacuate 800m downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 151).
First Actions for a UN 1647 Incident
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- 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 1647 — Methyl bromide and ethylene dibromide miHAZMAT RADIO NOTE — UN 1647
Product: Methyl bromide and ethylene dibromide mixture, liquid
Class 6 / Toxic / ERG 151
PPE: Level A required for large spills; SCBA mandatory; full chemical-resistant suit; neoprene or butyl rubber gloves; extremely hazardous vapors
ISOLATION: ERG 151: isolate spill 25-50m all directions; initial evacuation 100m in all directions; if fire or large spill, evacuate 800m downwind
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 1647 — Methyl bromide and ethylene dibromide mixture, liquid
Class: 6 | Placard: Toxic | ERG Guide: 151
Appearance: Clear to pale yellow liquid with a chloroform-like or sweet odor. Denser than water and will sink.
Water Reactivity: No significant reaction with water, but slowly hydrolyzes; very low water solubility
Extinguishing: Water spray, dry chemical, CO2; avoid direct water streams on spills
PPE: Level A required for large spills; SCBA mandatory; full chemical-resistant suit; neoprene or butyl rubber gloves; extremely hazardous vapors
Isolation: ERG 151: isolate spill 25-50m all directions; initial evacuation 100m in all directions; if fire or large spill, evacuate 800m downwind
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Avoid any skin contact.
• Fire may produce irritating, corrosive and/or toxic gases.
— First Actions —
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• 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.
SOURCE: allfirefighter.com/hazmat/un/methyl-bromide-and-ethylene-un-1647 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1647 Methyl bromide and ethylene dibromide mixture, liquid Cls6 ERG151 | allfirefighter.com/hazmat/un/methyl-bromide-and-ethylene-un-1647SMS / 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/methyl-bromide-and-ethylene-un-1647
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Frequently Asked Questions about UN 1647
Yes, methyl bromide and ethylene dibromide mixture is highly toxic and may be fatal if inhaled, ingested, or absorbed through skin.
Use Level A PPE with SCBA, full chemical-resistant suit, and neoprene or butyl rubber gloves.
Isolate spills and evacuate downwind.
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.