☣️ UN 1061 • CLASS 2
Methylamine, anhydrous
Placard: Flammable Gas. 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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Quick details
UN 1061
Class: 2
Placard type: Flammable Gas
ERG: Guide 118 (check current ERG)
Isolation: ERG 118: Initial isolation 100m all directions; Protective action distance 800m downwind (large spill day), 2500m (large spill night)
Chemical & Response Details
| Also known as | MonomethylamineMethanamineAminomethaneMMA |
| CAS Number | 74-89-5 |
| Appearance | Colorless compressed gas with a strong fishy or ammonia-like odor. Shipped as a liquefied compressed gas under pressure. |
| Flash Point | -10C (14F) |
| Boiling Point | -6.3C (20.7F) |
| Vapor Density | 1.08 (heavier than air) |
| Water Reactivity | Highly soluble in water forming alkaline solution; no violent reaction but releases heat |
| Extinguishing | Water spray, dry chemical, CO2; avoid direct water streams on liquid |
| PPE | ⚠️ Level B minimum with SCBA; full chemical protective clothing for liquid contact; cold-resistant gear for cryogenic exposure |
| Isolation | ERG 118: Initial isolation 100m all directions; Protective action distance 800m downwind (large spill day), 2500m (large spill night) |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- EXTREMELY FLAMMABLE.
- May be ignited by heat, sparks or flames.
- May form explosive mixtures with air.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- Vapors may travel to source of ignition and flash back.
- Some of these materials may react violently with water.
- Cylinders exposed to fire may vent and release flammable gas through pressure relief devices.
- Containers may explode when heated.
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 1061 — Methylamine, anhydrous HAZMAT RADIO NOTE — UN 1061
Product: Methylamine, anhydrous
Class 2 / Flammable Gas / ERG 118
PPE: Level B minimum with SCBA; full chemical protective clothing for liquid contact; cold-resistant gear for cryogenic exposure
ISOLATION: ERG 118: Initial isolation 100m all directions; Protective action distance 800m downwind (large spill day), 2500m (large spill night)
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 1061 — Methylamine, anhydrous
Class: 2 | Placard: Flammable Gas | ERG Guide: 118
Appearance: Colorless compressed gas with a strong fishy or ammonia-like odor. Shipped as a liquefied compressed gas under pressure.
Water Reactivity: Highly soluble in water forming alkaline solution; no violent reaction but releases heat
Extinguishing: Water spray, dry chemical, CO2; avoid direct water streams on liquid
PPE: Level B minimum with SCBA; full chemical protective clothing for liquid contact; cold-resistant gear for cryogenic exposure
Isolation: ERG 118: Initial isolation 100m all directions; Protective action distance 800m downwind (large spill day), 2500m (large spill night)
— Key Hazards —
• EXTREMELY FLAMMABLE.
• May be ignited by heat, sparks or flames.
• May form explosive mixtures with air.
— 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/1061 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1061 Methylamine, anhydrous Cls2 ERG118 | ERG 118: Initial isolation 100m all directions; Protective action distance 800m | allfirefighter.com/hazmat/un/1061SMS / 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/1061
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FAQ
EXTREMELY FLAMMABLE. May be ignited by heat, sparks or flames. May form explosive mixtures with air. Vapors from liquefied gas are initially heavier than air and spread along ground. Vapors may travel to source of ignition and flash back. Some of these materials may react violently with water. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated.
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 B minimum with SCBA; full chemical protective clothing for liquid contact; cold-resistant gear for cryogenic exposure
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 118 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.