UN 1098 — Allyl alcohol
Placard: Toxic. ERG Guide 131. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1098 is Allyl alcohol, a toxic and flammable liquid assigned to ERG Guide 131. It can be fatal by inhalation, ingestion or skin absorption while also creating flammable vapor and flashback hazards.
Hazard overview: UN 1098 presents combined toxic exposure and flammable liquid hazards. Vapors can form explosive mixtures and collect in low areas, while liquid or vapor contact may seriously injure skin, eyes or respiratory tissue.
Response guidance: For a UN 1098 incident, responders should confirm the product using shipping papers, container markings, SDS and ERG Guide 131. 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 1098 should emphasize combined toxicity, skin absorption, flammable vapor behavior, air monitoring and decontamination. Common errors include underestimating skin contact, entering vapor areas without SCBA and failing to control ignition sources. Use ERG 131, SDS and incident command.
Regulatory context: Allyl alcohol 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: Allyl alcohol 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 1098 Quick Details
Common Hazards of UN 1098
- TOXIC and HIGHLY FLAMMABLE; may be fatal if inhaled, ingested or absorbed through skin.
- Vapors may form explosive mixtures with air and travel to an ignition source.
- Liquid and vapor may irritate or burn skin, eyes and respiratory tissue.
- Vapors are heavier than air and may collect in low or confined areas.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or spill control may cause environmental contamination.
- Containers may rupture or explode when heated.
Chemical Identity & Physical Properties
Colorless to pale yellow liquid with a pungent, mustard-like odor. Highly flammable and volatile at room temperature.
| Also known as | 2-Propen-1-olPropenyl alcoholVinyl carbinol3-Hydroxypropene |
| CAS Number | 107-18-6 |
| Appearance | Colorless to pale yellow liquid with a pungent, mustard-like odor. Highly flammable and volatile at room temperature. |
| Flash Point | -21C (-6F) |
| Boiling Point | 97C (207F) |
| Vapor Density | 2.0 (heavier than air) |
| Water Reactivity | Soluble in water; no violent reaction but forms toxic solutions |
Fireground Response Guidance — UN 1098
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for vapor, fire or confined-space exposure. Chemical-resistant gloves, boots, splash protection and protective clothing should be selected using SDS, monitoring results and incident command because skin absorption and inhalation can be serious.
Isolation & Evacuation
First Actions for a UN 1098 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.
- Avoid breathing vapors and avoid skin or eye contact with liquid.
- 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 131, shipping papers, SDS and local SOP for protective actions and entry decisions.
📋 Copy & Share Field Card
UN 1098 — Allyl alcoholUse 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.