☣️ UN 0321 • CLASS 1
Cartridges for weapons, with bursting charge
Placard: Explosive 1.1F. 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 0321
Class: 1
Placard type: Explosive 1.1F
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: Isolate 500m (1600 ft) in all directions; if fire or explosion occurs, isolate 800m (1/2 mile) radius and consider evacuation for 1600m (1 mile) downwind
Chemical & Response Details
| Also known as | ammunition cartridges with bursting chargeexplosive ammunitionbursting cartridgesmilitary cartridges with explosive charge |
| Appearance | Metallic or composite cartridges containing propellant and a bursting charge designed to explode upon impact or detonation. Solid manufactured articles of various calibers and sizes. |
| Flash Point | Not applicable (explosive ordnance) |
| Boiling Point | Not applicable (explosive ordnance) |
| Vapor Density | Not applicable (solid explosive device) |
| Water Reactivity | No significant reaction with water, but moisture may degrade propellant or explosive components over time |
| Extinguishing | Do not use water or foam; fight fire from maximum distance using unmanned hose holders or monitor nozzles if involved in fire |
| PPE | ⚠️ Maximum protective distance recommended; full structural firefighting gear provides limited protection; evacuate area immediately if fire involves explosives; SCBA mandatory if entry required |
| Isolation | ERG 112: Isolate 500m (1600 ft) in all directions; if fire or explosion occurs, isolate 800m (1/2 mile) radius and consider evacuation for 1600m (1 mile) downwind |
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 0321 — Cartridges for weapons, with bursting ch HAZMAT RADIO NOTE — UN 0321
Product: Cartridges for weapons, with bursting charge
Class 1 / Explosive 1.1F / ERG 112
PPE: Maximum protective distance recommended; full structural firefighting gear provides limited protection; evacuate area immediately if fire involves explosives; SCBA mandatory if entry required
ISOLATION: ERG 112: Isolate 500m (1600 ft) in all directions; if fire or explosion occurs, isolate 800m (1/2 mile) radius and consider evacuation for 1600m (1 mile) downwind
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 0321 — Cartridges for weapons, with bursting charge
Class: 1 | Placard: Explosive 1.1F | ERG Guide: 112
Appearance: Metallic or composite cartridges containing propellant and a bursting charge designed to explode upon impact or detonation. Solid manufactured articles of various calibers and sizes.
Water Reactivity: No significant reaction with water, but moisture may degrade propellant or explosive components over time
Extinguishing: Do not use water or foam; fight fire from maximum distance using unmanned hose holders or monitor nozzles if involved in fire
PPE: Maximum protective distance recommended; full structural firefighting gear provides limited protection; evacuate area immediately if fire involves explosives; SCBA mandatory if entry required
Isolation: ERG 112: Isolate 500m (1600 ft) in all directions; if fire or explosion occurs, isolate 800m (1/2 mile) radius and consider evacuation for 1600m (1 mile) downwind
— 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/0321 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0321 Cartridges for weapons, with bursting charge Cls1 ERG112 | allfirefighter.com/hazmat/un/0321SMS / 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/0321
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.
Maximum protective distance recommended; full structural firefighting gear provides limited protection; evacuate area immediately if fire involves explosives; SCBA mandatory if entry required
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.