☣️ UN 2372 • CLASS 3
UN 2372 — 1,2-Di-(dimethylamino) ethane
Placard: Flammable. ERG Guide 129. 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 2372 Quick Details
UN 2372
Product name: 1,2-Di-(dimethylamino) ethane
DOT Class: 3
Placard type: Flammable
ERG Guide: 129 (check current ERG)
Initial isolation: ERG 129: isolate spill 50m all directions; if tank/rail car involved in fire, isolate 800m all directions
Common Hazards of UN 2372
- 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 | TMEDATetramethylethylenediamineN,N,N',N'-TetramethylethylenediamineTetramethyl-1,2-ethanediamine |
| CAS Number | 110-18-9 |
| Appearance | Colorless to pale yellow liquid with a fishy, ammonia-like odor. Hygroscopic and miscible with water. |
| Flash Point | -15C (5F) |
| Boiling Point | 121C (250F) |
| Vapor Density | 4.0 (heavier than air) |
| Water Reactivity | Miscible with water; no violent reaction but releases heat on mixing |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2372
Extinguishing Media
Alcohol-resistant foam, CO2, dry chemical; water spray for cooling
PPE Requirements
⚠️ Level B minimum; SCBA required; chemical-resistant gloves and suit due to corrosive amine properties
Isolation & Evacuation
ERG 129: isolate spill 50m all directions; if tank/rail car involved in fire, isolate 800m all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 129).
First Actions for a UN 2372 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 2372 — 1,2-Di-(dimethylamino) ethaneHAZMAT RADIO NOTE — UN 2372
Product: 1,2-Di-(dimethylamino) ethane
Class 3 / Flammable / ERG 129
PPE: Level B minimum; SCBA required; chemical-resistant gloves and suit due to corrosive amine properties
ISOLATION: ERG 129: isolate spill 50m all directions; if tank/rail car involved in fire, isolate 800m all directions
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 2372 — 1,2-Di-(dimethylamino) ethane
Class: 3 | Placard: Flammable | ERG Guide: 129
Appearance: Colorless to pale yellow liquid with a fishy, ammonia-like odor. Hygroscopic and miscible with water.
Water Reactivity: Miscible with water; no violent reaction but releases heat on mixing
Extinguishing: Alcohol-resistant foam, CO2, dry chemical; water spray for cooling
PPE: Level B minimum; SCBA required; chemical-resistant gloves and suit due to corrosive amine properties
Isolation: ERG 129: isolate spill 50m all directions; if tank/rail car involved in fire, isolate 800m all directions
— 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/2372 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2372 1,2-Di-(dimethylamino) ethane Cls3 ERG129 | allfirefighter.com/hazmat/un/2372SMS / 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/2372
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Frequently Asked Questions about UN 2372
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; SCBA required; chemical-resistant gloves and suit due to corrosive amine properties
Water reactivity: Miscible with water; no violent reaction but releases heat on mixing. Recommended extinguishing: Alcohol-resistant foam, CO2, dry chemical; water spray for cooling.
ERG Guide 129 recommendation: ERG 129: isolate spill 50m all directions; if tank/rail car involved in fire, isolate 800m all directions
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 129 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.