☣️ UN 1154 • CLASS 3
Diethylamine
Placard: Flammable. 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 1154
Class: 3
Placard type: Flammable
ERG: Guide 132 (check current ERG)
Verify shipping papers and exact product details; use ERG Guide 132 for initial actions and isolation/evacuation guidance.
Chemical & Response Details
| Also known as | N-EthylethanamineDiethylamine anhydrousDEAN,N-Diethylamine |
| CAS Number | 109-89-7 |
| Appearance | Colorless liquid with a strong ammonia-like or fishy odor. Highly volatile at room temperature. |
| Flash Point | -23C (-9F) |
| Boiling Point | 56C (133F) |
| Vapor Density | 2.5 (heavier than air) |
| Water Reactivity | Soluble in water; exothermic reaction but not violent |
| Extinguishing | Alcohol-resistant foam, CO2, dry chemical; water spray for cooling |
| PPE | ⚠️ Level B minimum; SCBA and chemical-resistant suit required; nitrile or butyl rubber gloves |
| Isolation | ERG 132: isolate spill 50m all directions; evacuate 800m downwind if large spill; 1600m if tank/rail car involved in fire |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Flammable/combustible material.
- May be 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.
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.
- 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.
- 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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MAYDAY / HAZMAT QUICK NOTE UN 1154 — Diethylamine Class: 3 | Placard: Flammable ERG: Guide 132 (check current ERG) FIRST ACTIONS: use SOP/SOG + ERG; stage upwind; isolate; deny entry; request Hazmat.
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FAQ
Flammable/combustible material. May be 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.
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 and chemical-resistant suit required; nitrile or butyl rubber gloves
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 132 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.