☣️ UN 0408 • CLASS 1
Fuzes, detonating, with protective features
Placard: Explosive 1.1B. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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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Quick details
UN 0408
Class: 1
Placard type: Explosive 1.1B
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: Initial isolation 500 meters in all directions; evacuate 1600 meters downwind if fire involved; treat as mass explosion hazard
Chemical & Response Details
| Appearance | Mechanical or electrical devices containing explosive components designed to initiate detonation in munitions or explosives. Typically metal assemblies with protective housings to prevent accidental initiation. |
| Flash Point | Not applicable (explosive device) |
| Boiling Point | Not applicable (explosive device) |
| Vapor Density | Not applicable (solid device) |
| Water Reactivity | No significant water reaction for most types, but moisture can affect electrical components in electronic fuzes |
| Extinguishing | Do not use water or foam; dry chemical or sand for small fires; withdraw from area for large fires |
| PPE | ⚠️ Minimum Level B with SCBA required; full structural firefighting gear with proximity suit recommended for fire involvement; approach only when absolutely necessary |
| Isolation | ERG 112: Initial isolation 500 meters in all directions; evacuate 1600 meters downwind if fire involved; treat as mass explosion hazard |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Mass explosion hazard — entire load may detonate simultaneously.
- Severe blast overpressure and fragmentation.
- Sensitive to heat, shock, and friction.
- Secondary fire and debris hazard.
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper.
- Establish large isolation zone — minimum 500 meters in all directions.
- Stage upwind, uphill; limit personnel to essential responders only.
- Request Hazmat + law enforcement + additional resources immediately.
- Do not fight fire — evacuate and isolate; let burn if no life safety risk.
- Protect exposures only if safe and directed by command.
- Consult current ERG Guide 112 and follow SOP/SOG.
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UN 0408 — Fuzes, detonating, with protective featu HAZMAT RADIO NOTE — UN 0408
Product: Fuzes, detonating, with protective features
Class 1 / Explosive 1.1B / ERG 112
PPE: Minimum Level B with SCBA required; full structural firefighting gear with proximity suit recommended for fire involvement; approach only when absolutely necessary
ISOLATION: ERG 112: Initial isolation 500 meters in all directions; evacuate 1600 meters downwind if fire involved; treat as mass explosion hazard
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 0408 — Fuzes, detonating, with protective features
Class: 1 | Placard: Explosive 1.1B | ERG Guide: 112
Appearance: Mechanical or electrical devices containing explosive components designed to initiate detonation in munitions or explosives. Typically metal assemblies with protective housings to prevent accidental initiation.
Water Reactivity: No significant water reaction for most types, but moisture can affect electrical components in electronic fuzes
Extinguishing: Do not use water or foam; dry chemical or sand for small fires; withdraw from area for large fires
PPE: Minimum Level B with SCBA required; full structural firefighting gear with proximity suit recommended for fire involvement; approach only when absolutely necessary
Isolation: ERG 112: Initial isolation 500 meters in all directions; evacuate 1600 meters downwind if fire involved; treat as mass explosion hazard
— Key Hazards —
• Mass explosion hazard — entire load may detonate simultaneously.
• Severe blast overpressure and fragmentation.
• Sensitive to heat, shock, and friction.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper.
• Establish large isolation zone — minimum 500 meters in all directions.
• Stage upwind, uphill; limit personnel to essential responders only.
• Request Hazmat + law enforcement + additional resources immediately.
SOURCE: allfirefighter.com/hazmat/un/0408 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0408 Fuzes, detonating, with protective features Cls1 ERG112 | allfirefighter.com/hazmat/un/0408SMS / 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/0408
Related UN numbers (same class)
Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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FAQ
Mass explosion hazard — entire load may detonate simultaneously. Severe blast overpressure and fragmentation. Sensitive to heat, shock, and friction. Secondary fire and debris hazard.
CALL 911. Then call emergency response telephone number on shipping paper. Establish large isolation zone — minimum 500 meters in all directions. Stage upwind, uphill; limit personnel to essential responders only.
Minimum Level B with SCBA required; full structural firefighting gear with proximity suit recommended for fire involvement; approach only when absolutely necessary
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 112 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.