☣️ UN 1062 • CLASS 2
Methyl bromide
Placard: Toxic Gas. 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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Quick details
UN 1062
Class: 2
Placard type: Toxic Gas
ERG: Guide 123 (check current ERG)
Isolation: ERG 123: Isolate spill area minimum 100m in all directions; evacuate downwind 800m during day or 1600m at night for large spills; toxic vapor cloud can travel considerable distances
Chemical & Response Details
| Also known as | BromomethaneMonobromomethaneTerabolHalon 1001EmbafumeMethogas |
| CAS Number | 74-83-9 |
| Appearance | Colorless gas or volatile liquid (below 4°C) with a chloroform-like odor at high concentrations; often odorless at dangerous concentrations. Shipped as a liquefied compressed gas. |
| Flash Point | Not applicable (non-flammable gas) |
| Boiling Point | 4°C (39°F) |
| Vapor Density | 3.3 (much heavier than air) |
| Water Reactivity | Slightly soluble in water; hydrolyzes slowly to form methanol and hydrobromic acid; no violent reaction |
| Extinguishing | Not applicable for fire control; use water spray to disperse vapors or protect exposures |
| PPE | ⚠️ Level A required for concentrated vapors or spills; SCBA mandatory; full chemical-resistant suit; gas is highly toxic and penetrates ordinary clothing; skin absorption is a major hazard |
| Isolation | ERG 123: Isolate spill area minimum 100m in all directions; evacuate downwind 800m during day or 1600m at night for large spills; toxic vapor cloud can travel considerable distances |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- TOXIC; may be fatal if inhaled or absorbed through skin.
- Vapors may be irritating and/or corrosive.
- Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may cause environmental contamination.
- Some may burn but none ignite readily.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Many gases are heavier than air and will spread along the ground and collect in low or confined areas
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
- 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 1062 — Methyl bromide HAZMAT RADIO NOTE — UN 1062
Product: Methyl bromide
Class 2 / Toxic Gas / ERG 123
PPE: Level A required for concentrated vapors or spills; SCBA mandatory; full chemical-resistant suit; gas is highly toxic and penetrates ordinary clothing; skin absorption is a major hazard
ISOLATION: ERG 123: Isolate spill area minimum 100m in all directions; evacuate downwind 800m during day or 1600m at night for large spills; toxic vapor cloud can travel considerable distances
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 1062 — Methyl bromide
Class: 2 | Placard: Toxic Gas | ERG Guide: 123
Appearance: Colorless gas or volatile liquid (below 4°C) with a chloroform-like odor at high concentrations; often odorless at dangerous concentrations. Shipped as a liquefied compressed gas.
Water Reactivity: Slightly soluble in water; hydrolyzes slowly to form methanol and hydrobromic acid; no violent reaction
Extinguishing: Not applicable for fire control; use water spray to disperse vapors or protect exposures
PPE: Level A required for concentrated vapors or spills; SCBA mandatory; full chemical-resistant suit; gas is highly toxic and penetrates ordinary clothing; skin absorption is a major hazard
Isolation: ERG 123: Isolate spill area minimum 100m in all directions; evacuate downwind 800m during day or 1600m at night for large spills; toxic vapor cloud can travel considerable distances
— Key Hazards —
• TOXIC; may be fatal if inhaled or absorbed through skin.
• Vapors may be irritating and/or corrosive.
• Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
— 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.
• Many gases are heavier than air and will spread along the ground and collect in low or confined areas
SOURCE: allfirefighter.com/hazmat/un/1062 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1062 Methyl bromide Cls2 ERG123 | ERG 123: Isolate spill area minimum 100m in all directions; evacuate downwind 80 | allfirefighter.com/hazmat/un/1062SMS / 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/1062
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FAQ
TOXIC; may be fatal if inhaled or absorbed through skin. Vapors may be irritating and/or corrosive. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause environmental contamination. Some may burn but none ignite readily. Vapors from liquefied gas are initially heavier than air and spread along ground. Cylinders exposed to fire may vent and release toxic and/or corrosive gas through pressure relief
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 concentrated vapors or spills; SCBA mandatory; full chemical-resistant suit; gas is highly toxic and penetrates ordinary clothing; skin absorption is a major hazard
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 123 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.