UN 3513 — Adsorbed gas, oxidizing, n.o.s.
Placard: Non-Flammable Gas. ERG Guide 174. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3513 is Adsorbed gas, oxidizing, n.o.s., a pressurized hazardous material assigned to ERG Guide 174. The exact contents should be verified from shipping papers and the SDS before close-range action.
Hazard overview: Primary hazards include fire or vapor ignition, accelerated burning, container rupture. Adsorbed gas, oxidizing, n.o.s. may release irritating, toxic or corrosive vapors when heated, spilled or involved in fire, so avoid contact, inhalation and incompatible materials.
Response guidance: For a UN 3513 incident, establish incident command, isolate the area, stay upwind and uphill, keep unauthorized personnel away, verify shipping papers/SDS and follow ERG 174. Use extinguishing, cooling, containment and decontamination tactics only when compatible with the material and local SOP.
UN 3513 Quick Details
Common Hazards of UN 3513
- Some gases will be ignited by heat, sparks or flames.
- Substance does not burn but will support combustion.
- Vapors may travel to source of ignition and flash back.
- Cylinders exposed to fire may vent and release flammable gas through pressure relief devices.
- Containers may explode when exposed to prolonged direct flame impingement.
- Vapors may cause dizziness or asphyxiation without warning, especially when in closed or confined areas.
- Some may be irritating if inhaled at high concentrations.
- Contact with gas may cause burns and injury.
Chemical Identity & Physical Properties
Generic category covering various oxidizing gases adsorbed onto porous solid materials in cylinders. The gas itself is typically colorless and odorless, stored on activated carbon or similar substrate to reduce pressure.
| Appearance | Generic category covering various oxidizing gases adsorbed onto porous solid materials in cylinders. The gas itself is typically colorless and odorless, stored on activated carbon or similar substrate to reduce pressure. |
| Flash Point | Not applicable (non-flammable gas, but supports combustion) |
| Boiling Point | Not applicable (varies by specific oxidizing gas) |
| Vapor Density | Not applicable (adsorbed on solid substrate) |
| Water Reactivity | Generally no direct water reaction, but can intensify fires by supporting combustion |
Fireground Response Guidance — UN 3513
Extinguishing Media
PPE Requirements
Level B minimum with SCBA required; full protective clothing for fire exposure; avoid contact with combustibles
Isolation & Evacuation
First Actions for a UN 3513 Incident
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
- Consider initial downwind evacuation for at least 800 meters (1/2 mile).
📋 Copy & Share Field Card
UN 3513 — Adsorbed gas, 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.