☣️ UN 0224 • CLASS 1
UN 0224 — Barium azide, dry
Placard: Explosive 1.1A. ERG Guide 112. 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 0224 Quick Details
UN 0224
Product name: Barium azide, dry
DOT Class: 1
Placard type: Explosive 1.1A
ERG Guide: 112 (check current ERG)
Initial isolation: ERG 112: isolate 500m all directions; if fire or explosion, evacuate 1600m initial isolation in all directions
Common Hazards of UN 0224
- Mass explosion hazard — entire load may detonate simultaneously.
- Severe blast overpressure and fragmentation.
- Sensitive to heat, shock, and friction.
- Secondary fire and debris hazard.
Chemical Identity & Physical Properties
| Also known as | Barium diazideBarium azide anhydrousBarium(II) azideBa(N3)2 |
| CAS Number | 18810-58-7 |
| Appearance | White to gray crystalline powder or solid, odorless. Shock-sensitive explosive compound in dry state. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (decomposes explosively) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water forming toxic hydrazoic acid vapor; avoid large quantities of water |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 0224
Extinguishing Media
Do not use water or foam; only dry methods for small fires; evacuate for significant quantity
PPE Requirements
⚠️ Level A required; full explosive ordnance disposal (EOD) protocols; remote operations preferred
Isolation & Evacuation
ERG 112: isolate 500m all directions; if fire or explosion, evacuate 1600m initial isolation in all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 112).
First Actions for a UN 0224 Incident
- 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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📋 Copy & Share Field Card
UN 0224 — Barium azide, dryHAZMAT RADIO NOTE — UN 0224
Product: Barium azide, dry
Class 1 / Explosive 1.1A / ERG 112
PPE: Level A required; full explosive ordnance disposal (EOD) protocols; remote operations preferred
ISOLATION: ERG 112: isolate 500m all directions; if fire or explosion, evacuate 1600m initial isolation 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 0224 — Barium azide, dry
Class: 1 | Placard: Explosive 1.1A | ERG Guide: 112
Appearance: White to gray crystalline powder or solid, odorless. Shock-sensitive explosive compound in dry state.
Water Reactivity: Soluble in water forming toxic hydrazoic acid vapor; avoid large quantities of water
Extinguishing: Do not use water or foam; only dry methods for small fires; evacuate for significant quantity
PPE: Level A required; full explosive ordnance disposal (EOD) protocols; remote operations preferred
Isolation: ERG 112: isolate 500m all directions; if fire or explosion, evacuate 1600m initial isolation in all directions
— 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/0224 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0224 Barium azide, dry Cls1 ERG112 | ERG 112: isolate 500m all directions; if fire or explosion, evacuate 1600m initi | allfirefighter.com/hazmat/un/0224SMS / 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/0224
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 0224
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.
Level A required; full explosive ordnance disposal (EOD) protocols; remote operations preferred
Water reactivity: Soluble in water forming toxic hydrazoic acid vapor; avoid large quantities of water. Recommended extinguishing: Do not use water or foam; only dry methods for small fires; evacuate for significant quantity.
ERG Guide 112 recommendation: ERG 112: isolate 500m all directions; if fire or explosion, evacuate 1600m initial isolation in all directions
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.