UN 1107 — Amyl chloride
Placard: Flammable. ERG Guide 129. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
Amyl chloride is a colorless to pale yellow liquid with a sharp, chloroform-like odor, posing significant fire and explosion hazards. It is volatile and less dense than water, which can exacerbate its flammability.
Hazard overview: Amyl chloride is highly flammable and can be easily ignited by heat, sparks, or flames, releasing toxic fumes. Its vapors may form explosive mixtures with air, posing a significant risk of explosion.
Response guidance: In case of an Amyl chloride spill, isolate the area immediately and evacuate people downwind to prevent inhalation of toxic fumes. Emergency responders should wear Level B PPE with SCBA and chemical-resistant suits to minimize skin contact and inhalation risks.
UN 1107 Quick Details
Common Hazards of UN 1107
- 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
Amyl chloride is a colorless to pale yellow liquid with a sharp, chloroform-like odor, volatile and less dense than water.
| Also known as | 1-chloropentanepentyl chloriden-amyl chloridechloropentane |
| CAS Number | 543-59-9 |
| Appearance | Colorless to pale yellow liquid with a sharp, chloroform-like odor. Volatile and less dense than water. |
| Flash Point | -7C (19F) |
| Boiling Point | 107-108C (225-226F) |
| Vapor Density | 3.7 (heavier than air) |
| Water Reactivity | No significant reaction; insoluble in water, floats on surface |
Fireground Response Guidance — UN 1107
Extinguishing Media
PPE Requirements
When handling Amyl chloride, wear Level B PPE with SCBA and chemical-resistant suits to prevent skin absorption and inhalation of toxic vapors.
Isolation & Evacuation
First Actions for a UN 1107 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 1107 — Amyl chlorideUse 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.