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 At a Glance
UN 3097 (Flammable solid, oxidizing) is listed as DOT Class 4 Flammable Solid and is assigned to ERG Guide 140. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
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.