☣️ UN 3335 • CLASS 9
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.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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UN 3335 Quick Details
UN 3335
Product name: Aviation regulated solid, n.o.s.
DOT Class: 9
Placard type: Miscellaneous
ERG Guide: 171 (check current ERG)
Initial isolation: ERG 171: isolate 25m in all directions initially; consult shipping documents for specific material
Common Hazards of UN 3335
- Some may burn but none ignite readily.
- Containers may explode when heated.
- Some may be transported hot.
- For UN3508, Capacitor, asymmetric, be aware of possible short circuiting as this product is transported
- Polymeric beads, expandable (UN2211) may evolve flammable vapours.
- Inhalation of material may be harmful.
- Contact may cause burns to skin and eyes.
- Inhalation of Asbestos dust may have a damaging effect on the lungs.
Chemical Identity & Physical Properties
| 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 |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3335
Extinguishing Media
Dry chemical, CO2, water spray acceptable for most
PPE Requirements
⚠️ Level D minimum; consult shipping papers for specific material requirements
Isolation & Evacuation
ERG 171: isolate 25m in all directions initially; consult shipping documents for specific material
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 171).
First Actions for a UN 3335 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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UN 3335 — Aviation regulated solid, n.o.s.HAZMAT RADIO NOTE — UN 3335
Product: Aviation regulated solid, n.o.s.
Class 9 / Miscellaneous / ERG 171
PPE: Level D minimum; consult shipping papers for specific material requirements
ISOLATION: ERG 171: isolate 25m in all directions initially; consult shipping documents for specific material
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 3335 — Aviation regulated solid, n.o.s.
Class: 9 | Placard: Miscellaneous | ERG Guide: 171
Appearance: Various solid materials not meeting other hazard class definitions but regulated for air transport. Physical appearance varies widely depending on specific substance.
Water Reactivity: Variable depending on specific material
Extinguishing: Dry chemical, CO2, water spray acceptable for most
PPE: Level D minimum; consult shipping papers for specific material requirements
Isolation: ERG 171: isolate 25m in all directions initially; consult shipping documents for specific material
— Key Hazards —
• Some may burn but none ignite readily.
• Containers may explode when heated.
• Some may be transported hot.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/3335 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3335 Aviation regulated solid, n.o.s. Cls9 ERG171 | allfirefighter.com/hazmat/un/3335SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/3335
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Frequently Asked Questions about UN 3335
Some may burn but none ignite readily. Containers may explode when heated. Some may be transported hot. For UN3508, Capacitor, asymmetric, be aware of possible short circuiting as this product is transported Polymeric beads, expandable (UN2211) may evolve flammable vapours. Inhalation of material may be harmful. Contact may cause burns to skin and eyes. Inhalation of Asbestos dust may have a damaging effect on the lungs.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level D minimum; consult shipping papers for specific material requirements
Water reactivity: Variable depending on specific material. Recommended extinguishing: Dry chemical, CO2, water spray acceptable for most.
ERG Guide 171 recommendation: ERG 171: isolate 25m in all directions initially; consult shipping documents for specific material
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 171 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles.
This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.