UN 1154 — Diethylamine
Placard: Flammable. ERG Guide 132. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
Diethylamine is a highly volatile and flammable substance that requires careful handling and storage. It is commonly used in various industrial applications, including the production of pharmaceuticals and pesticides.
Hazard overview: Diethylamine is a flammable and combustible material that may be ignited by heat, sparks, or flames. Prolonged exposure to the substance can cause serious health effects, including respiratory problems and skin irritation.
Response guidance: In the event of a diethylamine spill, emergency responders should isolate the area and evacuate anyone in the surrounding vicinity. A self-contained breathing apparatus (SCBA) and chemical-resistant suit are required to mitigate the risks associated with the substance.
UN 1154 Quick Details
Common Hazards of UN 1154
- 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.
Chemical Identity & Physical Properties
Diethylamine is a colorless liquid with a strong ammonia-like or fishy odor, highly volatile at room temperature.
| 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 |
Fireground Response Guidance — UN 1154
Extinguishing Media
PPE Requirements
Level B minimum personal protective equipment, including SCBA and chemical-resistant suit, and nitrile or butyl rubber gloves are required when handling diethylamine.
Isolation & Evacuation
First Actions for a UN 1154 Incident
- 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
📋 Copy & Share Field Card
UN 1154 — DiethylamineUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.