☣️ UN 0378 • CLASS 1
UN 0378 — Primers, cap type
Placard: Explosive 1.4B. 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 0378 Quick Details
UN 0378
Product name: Primers, cap type
DOT Class: 1
Placard type: Explosive 1.4B
ERG Guide: 114 (check current ERG)
Initial isolation: ERG 114: Initial isolation 100m in all directions; if fire involved, isolate 800m and consider evacuation for 800m in all directions
Common Hazards of UN 0378
- 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 | percussion capsprimer capsblasting capsignition primersdetonator caps |
| Appearance | Small metallic cups or cylinders containing a small amount of impact-sensitive explosive mixture. Typically brass, copper, or aluminum construction with pressed explosive compound inside. |
| Flash Point | Not applicable (explosive device) |
| Boiling Point | Not applicable (explosive device) |
| Vapor Density | Not applicable (solid device) |
| Water Reactivity | No significant reaction with water, though water may be used for cooling or containment |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 0378
Extinguishing Media
Water spray or fog preferred for fire control; dry chemical extinguishers acceptable for small fires
PPE Requirements
⚠️ Level C minimum for handling intact primers; Level B with SCBA if fire or deflagration has occurred; fragment protection recommended
Isolation & Evacuation
ERG 114: Initial isolation 100m in all directions; if fire 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 0378 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 0378 — Primers, cap typeHAZMAT RADIO NOTE — UN 0378
Product: Primers, cap type
Class 1 / Explosive 1.4B / ERG 114
PPE: Level C minimum for handling intact primers; Level B with SCBA if fire or deflagration has occurred; fragment protection recommended
ISOLATION: ERG 114: Initial isolation 100m in all directions; if fire 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 0378 — Primers, cap type
Class: 1 | Placard: Explosive 1.4B | ERG Guide: 114
Appearance: Small metallic cups or cylinders containing a small amount of impact-sensitive explosive mixture. Typically brass, copper, or aluminum construction with pressed explosive compound inside.
Water Reactivity: No significant reaction with water, though water may be used for cooling or containment
Extinguishing: Water spray or fog preferred for fire control; dry chemical extinguishers acceptable for small fires
PPE: Level C minimum for handling intact primers; Level B with SCBA if fire or deflagration has occurred; fragment protection recommended
Isolation: ERG 114: Initial isolation 100m in all directions; if fire 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/0378 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0378 Primers, cap type Cls1 ERG114 | ERG 114: Initial isolation 100m in all directions; if fire involved, isolate 800 | allfirefighter.com/hazmat/un/0378SMS / 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/0378
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 0378
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 intact primers; Level B with SCBA if fire or deflagration has occurred; fragment protection recommended
Water reactivity: No significant reaction with water, though water may be used for cooling or containment. Recommended extinguishing: Water spray or fog preferred for fire control; dry chemical extinguishers acceptable for small fires.
ERG Guide 114 recommendation: ERG 114: Initial isolation 100m in all directions; if fire 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.