UN 1125 — n-Butylamine
Placard: Flammable. ERG Guide 132. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
n-Butylamine is a flammable liquid with a strong ammonia-like or fishy odor, commonly used in various industrial applications. It is highly volatile and can be easily ignited by heat, sparks, or flames.
Hazard overview: n-Butylamine is a flammable and corrosive substance that can cause serious health effects, including respiratory problems and skin irritation. It can also react with water, releasing heat and posing a significant risk of fire and explosion.
Response guidance: In case of an n-Butylamine spill, it is essential to evacuate the area immediately and call for emergency services. Firefighters should use alcohol-resistant foam, CO2, or dry chemical to extinguish the fire, wearing Level B protective gear and SCBA.
UN 1125 Quick Details
Common Hazards of UN 1125
- 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
n-Butylamine is a colorless to pale yellow liquid with a strong ammonia-like or fishy odor and is highly volatile at room temperature.
| Also known as | 1-butanaminebutylaminemono-n-butylamine1-aminobutanenorvalamine |
| CAS Number | 109-73-9 |
| Appearance | Colorless to pale yellow liquid with a strong ammonia-like or fishy odor. Highly volatile at room temperature. |
| Flash Point | -12°C (10°F) |
| Boiling Point | 78°C (172°F) |
| Vapor Density | 2.5 (heavier than air) |
| Water Reactivity | Soluble in water, moderate exothermic reaction with water releasing heat |
Fireground Response Guidance — UN 1125
Extinguishing Media
PPE Requirements
Responders should wear Level B minimum protective gear, including chemical-resistant gloves and suit, and SCBA due to the corrosive nature of the substance.
Isolation & Evacuation
First Actions for a UN 1125 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 1125 — n-ButylamineUse 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.