☣️ UN 0104 • CLASS 1
UN 0104 — Fuse, detonating, metal clad, mild effect
Placard: Explosive 1.4D. ERG Guide 114. 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 0104 Quick Details
UN 0104
Product name: Fuse, detonating, metal clad, mild effect
DOT Class: 1
Placard type: Explosive 1.4D
ERG Guide: 114 (check current ERG)
Initial isolation: ERG 114: Initial isolation 200m all directions; if large fire or cargo involved, isolate 800m and consider evacuation for 800m in all directions
Common Hazards of UN 0104
- Minor blast or fire hazard — limited effect.
- Localized burning or deflagration possible.
- Smoke and heat from burning.
- Low mass explosion risk under normal conditions.
Chemical Identity & Physical Properties
| Also known as | Detonating cordDet cordMild detonating fuseMDFMetal-clad detonating fuseLow-energy detonating cord |
| Appearance | Flexible cord or cable with metal sheathing containing a core of mild explosive material, typically gray or green colored metal exterior, designed for controlled detonation with reduced blast effect. |
| Flash Point | Not applicable (explosive article) |
| Boiling Point | Not applicable (explosive article) |
| Vapor Density | Not applicable (solid explosive article) |
| Water Reactivity | No significant reaction under normal conditions; water may be used for fire suppression |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 0104
Extinguishing Media
Water spray, foam, dry chemical, CO2 acceptable; do not fight fire if detonation risk is imminent
PPE Requirements
⚠️ Level C minimum for handling; Level B with SCBA if fire or smoke present; structural firefighter PPE with distance for fire operations
Isolation & Evacuation
ERG 114: Initial isolation 200m all directions; if large fire or cargo involved, isolate 800m and consider evacuation for 800m in all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 114).
First Actions for a UN 0104 Incident
- CALL 911. Notify law enforcement.
- Isolate area; keep unauthorized personnel away.
- Stage upwind; eliminate ignition sources.
- Request Hazmat + law enforcement.
- Consult current ERG Guide 114 and follow SOP/SOG.
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📋 Copy & Share Field Card
UN 0104 — Fuse, detonating, metal clad, mild effecHAZMAT RADIO NOTE — UN 0104
Product: Fuse, detonating, metal clad, mild effect
Class 1 / Explosive 1.4D / ERG 114
PPE: Level C minimum for handling; Level B with SCBA if fire or smoke present; structural firefighter PPE with distance for fire operations
ISOLATION: ERG 114: Initial isolation 200m all directions; if large fire or cargo involved, isolate 800m and consider evacuation for 800m in all directions
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 0104 — Fuse, detonating, metal clad, mild effect
Class: 1 | Placard: Explosive 1.4D | ERG Guide: 114
Appearance: Flexible cord or cable with metal sheathing containing a core of mild explosive material, typically gray or green colored metal exterior, designed for controlled detonation with reduced blast effect.
Water Reactivity: No significant reaction under normal conditions; water may be used for fire suppression
Extinguishing: Water spray, foam, dry chemical, CO2 acceptable; do not fight fire if detonation risk is imminent
PPE: Level C minimum for handling; Level B with SCBA if fire or smoke present; structural firefighter PPE with distance for fire operations
Isolation: ERG 114: Initial isolation 200m all directions; if large fire or cargo involved, isolate 800m and consider evacuation for 800m in all directions
— Key Hazards —
• Minor blast or fire hazard — limited effect.
• Localized burning or deflagration possible.
• Smoke and heat from burning.
— First Actions —
• CALL 911. Notify law enforcement.
• Isolate area; keep unauthorized personnel away.
• Stage upwind; eliminate ignition sources.
• Request Hazmat + law enforcement.
SOURCE: allfirefighter.com/hazmat/un/0104 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0104 Fuse, detonating, metal clad, mild effect Cls1 ERG114 | allfirefighter.com/hazmat/un/0104SMS / 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/0104
Related UN Numbers in Class 1
Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
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Frequently Asked Questions about UN 0104
Minor blast or fire hazard — limited effect. Localized burning or deflagration possible. Smoke and heat from burning. Low mass explosion risk under normal conditions.
CALL 911. Notify law enforcement. Isolate area; keep unauthorized personnel away. Stage upwind; eliminate ignition sources.
Level C minimum for handling; Level B with SCBA if fire or smoke present; structural firefighter PPE with distance for fire operations
Water reactivity: No significant reaction under normal conditions; water may be used for fire suppression. Recommended extinguishing: Water spray, foam, dry chemical, CO2 acceptable; do not fight fire if detonation risk is imminent.
ERG Guide 114 recommendation: ERG 114: Initial isolation 200m all directions; if large fire or cargo involved, isolate 800m and consider evacuation for 800m in all directions
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 114 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.