☣️ UN 3268 • CLASS 9
UN 3268 — Seat-belt pre-tensioners
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 3268 Quick Details
UN 3268
Product name: Seat-belt pre-tensioners
DOT Class: 9
Placard type: Miscellaneous
ERG Guide: 171 (check current ERG)
Initial isolation: ERG 171: no evacuation distances listed for small spills; if fire involved, isolate 25m in all directions; if bulk quantities, increase isolation to 80m
Common Hazards of UN 3268
- 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 | Seatbelt pretensionersPyrotechnic pretensioning devicesAirbag pretensionersSafety belt pretensioners |
| Appearance | Mechanical devices containing small pyrotechnic charges (typically sodium azide or similar propellants) used in vehicle safety systems. Metal and plastic assemblies that appear as compact cylindrical or rectangular units. |
| Flash Point | Not applicable (pyrotechnic device) |
| Boiling Point | Not applicable (mechanical device with explosive charge) |
| Vapor Density | Not applicable (solid device) |
| Water Reactivity | No significant reaction with water; device designed to be stable under normal conditions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3268
Extinguishing Media
Dry chemical, CO2, water spray acceptable for surrounding fire; allow small fires to burn out
PPE Requirements
⚠️ Level D for handling intact devices; Level C with SCBA if devices are damaged or fire involved; eye and face protection mandatory
Isolation & Evacuation
ERG 171: no evacuation distances listed for small spills; if fire involved, isolate 25m in all directions; if bulk quantities, increase isolation to 80m
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 171).
First Actions for a UN 3268 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 3268 — Seat-belt pre-tensionersHAZMAT RADIO NOTE — UN 3268
Product: Seat-belt pre-tensioners
Class 9 / Miscellaneous / ERG 171
PPE: Level D for handling intact devices; Level C with SCBA if devices are damaged or fire involved; eye and face protection mandatory
ISOLATION: ERG 171: no evacuation distances listed for small spills; if fire involved, isolate 25m in all directions; if bulk quantities, increase isolation to 80m
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 3268 — Seat-belt pre-tensioners
Class: 9 | Placard: Miscellaneous | ERG Guide: 171
Appearance: Mechanical devices containing small pyrotechnic charges (typically sodium azide or similar propellants) used in vehicle safety systems. Metal and plastic assemblies that appear as compact cylindrical or rectangular units.
Water Reactivity: No significant reaction with water; device designed to be stable under normal conditions
Extinguishing: Dry chemical, CO2, water spray acceptable for surrounding fire; allow small fires to burn out
PPE: Level D for handling intact devices; Level C with SCBA if devices are damaged or fire involved; eye and face protection mandatory
Isolation: ERG 171: no evacuation distances listed for small spills; if fire involved, isolate 25m in all directions; if bulk quantities, increase isolation to 80m
— 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/3268 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3268 Seat-belt pre-tensioners Cls9 ERG171 | allfirefighter.com/hazmat/un/3268SMS / 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/3268
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Frequently Asked Questions about UN 3268
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 for handling intact devices; Level C with SCBA if devices are damaged or fire involved; eye and face protection mandatory
Water reactivity: No significant reaction with water; device designed to be stable under normal conditions. Recommended extinguishing: Dry chemical, CO2, water spray acceptable for surrounding fire; allow small fires to burn out.
ERG Guide 171 recommendation: ERG 171: no evacuation distances listed for small spills; if fire involved, isolate 25m in all directions; if bulk quantities, increase isolation to 80m
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.