UN 3167 — Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid
Placard: Flammable Gas. ERG Guide 115. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3167 is Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid, a flammable gas sample entry assigned to ERG Guide 115. Small non-pressurized samples can still form explosive mixtures.
Hazard overview: Flammable non-pressurized gas sample, n.o.s.; small containers can still release explosive vapor mixtures. Gas may ignite easily by heat, sparks, static or open flame. Vapor density and toxicity vary by sample composition.
Response guidance: For UN 3167, isolate the package or sample container, use monitoring and avoid ignition sources where flammable. Ventilate only if trained and equipped under ERG 115.
Firefighter training notes: Training for UN 3167 should emphasize cylinder/package recognition, vapor density, air monitoring, SCBA use, frostbite/toxicity controls, isolation and source-control limits. Use ERG 115, SDS and local SOP.
Regulatory context: Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, package type, formulation and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Gas sample, non-pressurized, flammable, n.o.s., not refrigerated liquid should be stored in secured, compatible cylinders or sample packages away from heat, physical damage and unauthorized access, with ventilation, segregation and emergency planning based on exact gas identity.
UN 3167 Quick Details
Common Hazards of UN 3167
- Flammable non-pressurized gas sample, n.o.s.; small containers can still release explosive vapor mixtures.
- Gas may ignite easily by heat, sparks, static or open flame.
- Vapor density and toxicity vary by sample composition.
- Leaking sample containers can contaminate enclosed cabinets, vehicles or laboratories.
- Fire may produce toxic or irritating gases depending on sample identity.
- Do not overstate cylinder rocket hazard for non-pressurized samples, but heat can still rupture containers.
- Exact sample identity must be verified from laboratory documentation and shipping papers.
Chemical Identity & Physical Properties
Gaseous material at room temperature, stored in non-pressurized containers. Color and odor vary depending on specific gas composition.
| Also known as | Non-pressurized gas sampleFlammable gas sample NOSGas sample in non-pressurized container |
| Appearance | Gaseous material at room temperature, stored in non-pressurized containers. Color and odor vary depending on specific gas composition. |
| Flash Point | Not applicable (gas) |
| Boiling Point | Not applicable (varies by composition) |
| Vapor Density | Varies by composition (typically heavier than air) |
| Water Reactivity | No significant reaction with water |
Fireground Response Guidance — UN 3167
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA and chemical-resistant protection for unknown or toxic sample releases. Use monitoring before ventilation or close handling.
Isolation & Evacuation
First Actions for a UN 3167 Incident
- Call 911 and the emergency response number on the shipping paper, if available.
- Keep unauthorized personnel away and establish incident command.
- Stay upwind, uphill and upstream.
- Eliminate ignition sources if this can be done safely.
- Avoid breathing vapor, gas, dust, mist, smoke or fumes and avoid skin or eye contact.
- Do not touch damaged containers, cylinders, articles or spilled material without proper training and PPE.
- Prevent contaminated runoff, debris and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 115, SDS, shipping papers, markings and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3167 — Gas sample, non-pressurized, flammable,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.