UN 3335 — Aviation regulated solid, n.o.s.
Placard: Miscellaneous. ERG Guide 171. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3335 is Aviation regulated solid, n.o.s., a broad Class 9 aviation-regulated solid assigned to ERG Guide 171. Exact material identity must be verified from shipping papers.
Hazard overview: Class 9 aviation regulated solid, n.o.s.; hazard depends on the exact material restricted for air transport. Some materials may burn or produce irritating smoke, but fire behavior varies widely. Dust, broken packages or residues may irritate skin, eyes or respiratory tract depending on contents.
Response guidance: For UN 3335, isolate the area, avoid exposure and use SCBA where vapor, dust, smoke or fire is present. Verify exact controls with SDS and ERG 171.
Firefighter training notes: Training for UN 3335 should emphasize product verification, SCBA use, exposure control, decontamination, runoff containment and SDS/shipping paper review. Use ERG 171, SDS and local SOP.
Regulatory context: Aviation regulated solid, 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, package type, formulation and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Aviation regulated solid, n.o.s. should be stored in tightly closed compatible containers or packages with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 3335 Quick Details
Common Hazards of UN 3335
- Class 9 aviation regulated solid, n.o.s.; hazard depends on the exact material restricted for air transport.
- Some materials may burn or produce irritating smoke, but fire behavior varies widely.
- Dust, broken packages or residues may irritate skin, eyes or respiratory tract depending on contents.
- Heated packages may rupture or release hazardous residues.
- Runoff or cleanup debris may require control if the material is environmentally regulated.
- Do not apply unrelated UN3508, asbestos or polymeric-bead assumptions unless present in the shipment.
- Exact substance must be verified from shipping papers and package markings.
Chemical Identity & Physical Properties
Various solid materials not meeting other hazard class definitions but regulated for air transport. Physical appearance varies widely depending on specific substance.
| Also known as | Aviation regulated solidAir transport regulated solidMiscellaneous dangerous goods solidClass 9 regulated solid |
| Appearance | Various solid materials not meeting other hazard class definitions but regulated for air transport. Physical appearance varies widely depending on specific substance. |
| Flash Point | Not applicable (n.o.s. entry) |
| Boiling Point | Not applicable (n.o.s. entry) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Variable depending on specific material |
Fireground Response Guidance — UN 3335
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for vapor, dust, smoke, fire or confined-space exposure. Wear chemical-resistant gloves, eye/face protection and protective clothing.
Isolation & Evacuation
First Actions for a UN 3335 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, gas, mist, smoke or aerosols and avoid skin or eye contact.
- Do not touch damaged containers, cylinders, packages or spilled material without proper training and PPE.
- Prevent contaminated liquid, dust, runoff, residue and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 171, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3335 — Aviation regulated solid, 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.