☣️ UN 2367 • CLASS 3
UN 2367 — Methyl valeraldehyde (alpha)
Placard: Flammable. ERG Guide 130. 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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UN 2367 Quick Details
UN 2367
Product name: Methyl valeraldehyde (alpha)
DOT Class: 3
Placard type: Flammable
ERG Guide: 130 (check current ERG)
Initial isolation: ERG 130: Isolate spill 50m all directions; for large spills isolate 150m; evacuate 800m downwind if tank/rail car involved in fire
Common Hazards of UN 2367
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
- Vapors may travel to source of ignition and flash back.
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapor explosion hazard indoors, outdoors or in sewers.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Runoff to sewer may create fire or explosion hazard.
- Containers may explode when heated.
Chemical Identity & Physical Properties
| Also known as | alpha-Methylvaleraldehyde2-Methylpentanal2-Methylvaleraldehyde2-Methyl-n-valeraldehyde |
| CAS Number | 110-41-8 |
| Appearance | Colorless to pale yellow liquid with a pungent, aldehyde-like odor. Liquid at room temperature. |
| Flash Point | 18°C (64°F) |
| Boiling Point | 117-118°C (243-244°F) |
| Vapor Density | 3.5 (heavier than air) |
| Water Reactivity | No significant reaction with water; slightly soluble |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2367
Extinguishing Media
Alcohol-resistant foam, CO2, dry chemical, water spray
PPE Requirements
⚠️ Level B minimum recommended; SCBA and chemical-resistant suit for fire or large spills
Isolation & Evacuation
ERG 130: Isolate spill 50m all directions; for large spills isolate 150m; evacuate 800m downwind if tank/rail car involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 130).
First Actions for a UN 2367 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.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 50 meters (150 feet) in all directions.
- Consider initial downwind evacuation for at least 300 meters (1000 feet).
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📋 Copy & Share Field Card
UN 2367 — Methyl valeraldehyde (alpha)HAZMAT RADIO NOTE — UN 2367
Product: Methyl valeraldehyde (alpha)
Class 3 / Flammable / ERG 130
PPE: Level B minimum recommended; SCBA and chemical-resistant suit for fire or large spills
ISOLATION: ERG 130: Isolate spill 50m all directions; for large spills isolate 150m; evacuate 800m downwind if tank/rail car involved in fire
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 2367 — Methyl valeraldehyde (alpha)
Class: 3 | Placard: Flammable | ERG Guide: 130
Appearance: Colorless to pale yellow liquid with a pungent, aldehyde-like odor. Liquid at room temperature.
Water Reactivity: No significant reaction with water; slightly soluble
Extinguishing: Alcohol-resistant foam, CO2, dry chemical, water spray
PPE: Level B minimum recommended; SCBA and chemical-resistant suit for fire or large spills
Isolation: ERG 130: Isolate spill 50m all directions; for large spills isolate 150m; evacuate 800m downwind if tank/rail car involved in fire
— Key Hazards —
• HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
• Vapors may travel to source of ignition and flash back.
— 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.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/2367 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2367 Methyl valeraldehyde (alpha) Cls3 ERG130 | allfirefighter.com/hazmat/un/2367SMS / 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/2367
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Frequently Asked Questions about UN 2367
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. 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 recommended; SCBA and chemical-resistant suit for fire or large spills
Water reactivity: No significant reaction with water; slightly soluble. Recommended extinguishing: Alcohol-resistant foam, CO2, dry chemical, water spray.
ERG Guide 130 recommendation: ERG 130: Isolate spill 50m all directions; for large spills isolate 150m; evacuate 800m downwind if tank/rail car involved in fire
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 130 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.