UN 1110 — n-Amyl methyl ketone
Placard: Flammable. ERG Guide 127. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
n-Amyl methyl ketone is a highly flammable liquid with a fruity, banana-like odor, and is commonly used as a solvent. It has moderate volatility and can easily ignite in the presence of heat or sparks.
Hazard overview: n-Amyl methyl ketone is highly flammable and can form explosive mixtures with air, making it a significant hazard in the event of a spill or leak. Vapors can also ignite easily, causing a rapid spread of fire.
Response guidance: In the event of an n-Amyl methyl ketone spill, isolate the area immediately and evacuate downwind areas to prevent further ignition. Firefighters should use AFFF foam, alcohol-resistant foam, CO2, or dry chemical to extinguish the fire, and wear Level B protective gear with SCBA.
UN 1110 Quick Details
Common Hazards of UN 1110
- 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
n-Amyl methyl ketone is a colorless liquid with a fruity, banana-like odor, and has moderate volatility at room temperature.
| Also known as | 2-HeptanoneMethyl amyl ketoneMethyl n-amyl ketoneMAKHeptan-2-one |
| CAS Number | 110-43-0 |
| Appearance | Colorless liquid with a fruity, banana-like odor. Liquid at room temperature with moderate volatility. |
| Flash Point | 39°C (102°F) |
| Boiling Point | 151°C (304°F) |
| Vapor Density | 3.9 (heavier than air) |
| Water Reactivity | No significant reaction; slightly soluble in water |
Fireground Response Guidance — UN 1110
Extinguishing Media
PPE Requirements
Responders should wear Level B minimum protective gear with SCBA in vapor areas, and structural firefighter gear with SCBA for fire situations to prevent skin contact and inhalation of vapors.
Isolation & Evacuation
First Actions for a UN 1110 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.
- Consider initial downwind evacuation for at least 300 meters (1000 feet).
📋 Copy & Share Field Card
UN 1110 — n-Amyl methyl ketoneUse 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.