UN 1992 — Flammable liquid, poisonous, n.o.s.
Placard: Flammable. ERG Guide 131. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1992 is Flammable liquid, poisonous, n.o.s., a toxic flammable liquid n.o.s. entry assigned to ERG Guide 131. It requires both ignition control and toxic exposure control.
Hazard overview: TOXIC and FLAMMABLE liquid n.o.s.; may be fatal if inhaled, ingested or absorbed through skin. Vapors may ignite easily and form explosive mixtures with air. Vapors are generally heavier than air and may travel to ignition sources and flash back.
Response guidance: For a UN 1992 incident, verify the product with shipping papers, container markings, SDS and ERG Guide 131. Establish incident command, isolate the area, stay upwind, control ignition or downwind hazards, cool exposed containers from a protected distance when appropriate and base entry decisions on monitoring and local SOP.
Firefighter training notes: Training for UN 1992 should emphasize flammable vapor travel, toxic exposure routes, skin absorption, foam selection, decontamination and runoff control. Use ERG 131, SDS and local SOP.
Regulatory context: Flammable liquid, poisonous, n.o.s. is regulated as a hazardous material for transportation and emergency response purposes. Storage, workplace exposure, emergency planning, spill reporting and waste handling requirements vary by exact product, concentration, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, container markings and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Flammable liquid, poisonous, n.o.s. should be stored in approved flammable/toxic-liquid containers with ventilation, bonding/grounding where required, spill containment and separation from heat, ignition sources, oxidizers and incompatible materials.
UN 1992 Quick Details
Common Hazards of UN 1992
- TOXIC and FLAMMABLE liquid n.o.s.; may be fatal if inhaled, ingested or absorbed through skin.
- Vapors may ignite easily and form explosive mixtures with air.
- Vapors are generally heavier than air and may travel to ignition sources and flash back.
- Skin contact may be a major exposure route depending on the specific chemical.
- Runoff to sewers may create fire, explosion and toxic contamination hazards.
- Fire may produce irritating, corrosive and/or toxic gases.
- Exact hazards depend on the specific product named on shipping papers and SDS.
Chemical Identity & Physical Properties
Variable appearance depending on specific substance; typically a liquid at room temperature with potentially irritating or toxic vapors. Color and odor vary widely as this is a generic shipping classification covering multiple chemicals.
| Also known as | Flammable liquid, toxic, n.o.s.Poisonous flammable liquidToxic flammable liquid NOSClass 3 PG I/II/III toxic liquid |
| Appearance | Variable appearance depending on specific substance; typically a liquid at room temperature with potentially irritating or toxic vapors. Color and odor vary widely as this is a generic shipping classification covering multiple chemicals. |
| Flash Point | Below 60.5C (141F) for Class 3 flammable liquids; exact value depends on specific substance |
| Boiling Point | Variable depending on specific chemical; generally ranges from 50C to 200C (122F to 392F) |
| Vapor Density | Typically >1 (heavier than air) for most flammable organic liquids; specific value depends on substance |
| Water Reactivity | Generally no violent reaction with water, though some specific substances may react; consult specific chemical data |
Fireground Response Guidance — UN 1992
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for vapor, fire or confined-space exposure. Chemical-resistant suit, gloves, boots and eye/face protection should be selected from SDS; avoid all skin contact.
Isolation & Evacuation
First Actions for a UN 1992 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.
- Avoid breathing vapors, gas, smoke, mist or dust and avoid skin or eye contact.
- Eliminate ignition sources if safe and keep vapors and runoff out of drains, sewers, basements and low areas.
- Do not touch damaged containers or spilled/released material unless properly trained and wearing appropriate protective equipment.
- Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
- Isolate the release or spill area and expand the perimeter for fire involvement, vapor accumulation, cylinder/tank heating or unknown product identity.
- Use ERG Guide 131, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1992 — Flammable liquid, poisonous, n.o.s.Use 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.