☣️ 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.
🚒☣️
⚠️ 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 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
| 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
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
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- 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 —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• 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
SOURCE: allfirefighter.com/hazmat/un/1647 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1647 Methyl bromide and ethylene dibromide mixture, liquid Cls6 ERG151 | allfirefighter.com/hazmat/un/1647SMS / 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/1647
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Frequently Asked Questions about 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.
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 for large spills; SCBA mandatory; full chemical-resistant suit; neoprene or butyl rubber gloves; extremely hazardous vapors
Water reactivity: No significant reaction with water, but slowly hydrolyzes; very low water solubility. Recommended extinguishing: Water spray, dry chemical, CO2; avoid direct water streams on spills.
ERG Guide 151 recommendation: ERG 151: isolate spill 25-50m all directions; initial evacuation 100m in all directions; if fire or large spill, evacuate 800m downwind
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 151 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.