UN 1091 — Acetone oils
Placard: Flammable. ERG Guide 127. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1091 is Acetone oils, a Class 3 flammable mixed solvent/residue liquid assigned to ERG Guide 127. Composition may vary, so responders should verify the exact product using shipping papers and SDS.
Hazard overview: UN 1091 presents flammable vapor, flashback and sewer vapor-explosion hazards. Because acetone oils may be a mixed stream, toxicity, solubility and foam compatibility should be confirmed from the SDS before close action.
Response guidance: For a UN 1091 incident, responders should confirm the product using shipping papers, container markings, SDS and ERG Guide 127. Establish incident command, isolate the area, stay upwind and uphill, remove ignition sources when safe, keep vapors out of sewers and use compatible Class B fire-control agents from a protected position.
Firefighter training notes: Training for UN 1091 should emphasize flammable liquid vapor travel, flashback, sewer vapor explosion risk, foam compatibility, container cooling and atmospheric monitoring. Common errors include standing downwind, allowing runoff into drains, ignoring low-area vapor collection and using non-compatible foam. Use ERG 127, SDS and local SOP.
Regulatory context: Acetone oils is regulated as a hazardous material for transportation and emergency response purposes. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by product, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Acetone oils should be stored in tightly closed compatible containers in a cool, dry, well-ventilated flammable-liquid storage area. Keep away from heat, sparks, open flames, oxidizers and incompatible materials, with bonding/grounding, secondary containment and drain protection where required.
UN 1091 Quick Details
Common Hazards of UN 1091
- HIGHLY FLAMMABLE mixed solvent liquid; composition may vary by source.
- Vapors may form explosive mixtures with air and flash back to the source.
- Most vapors are heavier than air and may spread into low, confined or sewer areas.
- Liquid may float or form separate layers and spread fire across surfaces.
- Fire may produce irritating or toxic combustion products.
- Runoff to sewer may create fire, explosion or environmental hazards.
- Containers may rupture or explode when heated.
Chemical Identity & Physical Properties
Clear to yellowish-brown liquid with a characteristic acetone-like or solvent odor. Liquid at room temperature with varying composition depending on manufacturing process.
| Also known as | Acetone oilPyroligneous spiritWood naphtha distillateAcetone distillation residues |
| Appearance | Clear to yellowish-brown liquid with a characteristic acetone-like or solvent odor. Liquid at room temperature with varying composition depending on manufacturing process. |
| Flash Point | -20C to 10C (-4F to 50F) depending on composition |
| Boiling Point | 56C to 150C (133F to 302F) wide range due to mixed components |
| Vapor Density | 2.0-3.0 (heavier than air) |
| Water Reactivity | No significant reaction with water, but may form separate layers |
Fireground Response Guidance — UN 1091
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for fire, heavy vapor or confined-space exposure. Chemical-resistant gloves, splash protection and protective clothing should be selected using SDS, product concentration and incident command.
Isolation & Evacuation
First Actions for a UN 1091 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Eliminate ignition sources if it is safe to do so.
- Do not touch or walk through spilled liquid unless properly trained and wearing appropriate protective equipment.
- Ventilate closed spaces before entering, but only if properly trained, equipped and authorized by incident command.
- Isolate the spill or leak area for at least 50 meters (150 feet) in all directions.
- For large spills or fire involvement, expand isolation and consider downwind evacuation based on vapor movement, monitoring and incident command.
- Use ERG Guide 127, shipping papers, SDS and local SOP for protective actions and entry decisions.
📋 Copy & Share Field Card
UN 1091 — Acetone oilsUse 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.