UN 3097 — Flammable solid, oxidizing, n.o.s.
Placard: Flammable Solid. ERG Guide 140. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3097 is Flammable solid, oxidizing, n.o.s., a broad flammable oxidizing solid assigned to ERG Guide 140. Fire can accelerate rapidly if contaminated.
Hazard overview: FLAMMABLE and OXIDIZING solid, n.o.s.; fire can accelerate rapidly and behave unpredictably. May ignite by heat, sparks, friction or contamination. May decompose violently when heated, confined or contaminated with incompatible materials.
Response guidance: For UN 3097, isolate the area, remove combustibles/reducing agents and identify the exact oxidizer. Use compatible tactics and contain toxic/corrosive runoff under ERG 140.
Firefighter training notes: Training for UN 3097 should emphasize product verification, SCBA use, oxidizer/corrosive compatibility, vapor/dust monitoring, decontamination and runoff control. Use ERG 140, SDS and local SOP.
Regulatory context: Flammable solid, oxidizing, n.o.s. is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, formulation, temperature-control status and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Flammable solid, oxidizing, n.o.s. should be stored in compatible oxidizer/corrosive-rated containers away from combustibles, organics, fuels, reducing agents, heat and contamination.
UN 3097 Quick Details
Common Hazards of UN 3097
- FLAMMABLE and OXIDIZING solid, n.o.s.; fire can accelerate rapidly and behave unpredictably.
- May ignite by heat, sparks, friction or contamination.
- May decompose violently when heated, confined or contaminated with incompatible materials.
- Contact with fuels, organics or reducing agents may cause fire or explosion.
- Dust may spread contamination and increase burning surface area.
- Fire may produce toxic or corrosive smoke depending on the exact substance.
- Exact identity must be verified before selecting extinguishing media.
Chemical Identity & Physical Properties
Variable appearance depending on specific substance; typically a solid material at room temperature that exhibits both flammable and oxidizing properties, creating unusual fire hazards.
| Also known as | Flammable solid with oxidizing propertiesOxidizing flammable solid NOSClass 4.1 oxidizing solid |
| Appearance | Variable appearance depending on specific substance; typically a solid material at room temperature that exhibits both flammable and oxidizing properties, creating unusual fire hazards. |
| Flash Point | Not applicable (solid with dual flammable/oxidizing properties) |
| Boiling Point | Not applicable (varies by specific substance) |
| Vapor Density | Not applicable (solid material) |
| Water Reactivity | Variable — depends on specific substance; use caution as some components may react |
Fireground Response Guidance — UN 3097
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for fire, dust or decomposition fumes. Wear chemical/thermal protection and keep distance for explosion or rapid-burning risk.
Isolation & Evacuation
First Actions for a UN 3097 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.
- Avoid breathing vapor, dust, mist, smoke or fumes and avoid skin or eye contact.
- Keep combustibles, organics, fuels and reducing agents away from the oxidizer.
- Do not touch damaged containers or spilled material without proper training and PPE.
- Prevent contaminated liquid, dust, runoff and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 140, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3097 — Flammable solid, oxidizing, 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.