☣️ UN 0129 • CLASS 1
Lead azide, wetted
Placard: Explosive 1.1A. 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 0129
Class: 1
Placard type: Explosive 1.1A
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: isolate 500m minimum all directions; evacuate 1600m downwind if fire or explosion risk
Chemical & Response Details
| Also known as | Lead diazideLead(II) azidePb(N3)2Plumbous azide |
| CAS Number | 13424-46-9 |
| Appearance | White to buff-colored crystalline powder or small crystals. Odorless. Supplied wetted with water or alcohol for safety during transport and handling. |
| Flash Point | Not applicable (primary explosive solid) |
| Boiling Point | Not applicable (decomposes explosively at approximately 350C) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Stable when wetted with at least 20% water; dry material is extremely shock-sensitive and explosive |
| Extinguishing | Water spray only to keep wetted; no foam, CO2, or dry chemical on dry material |
| PPE | ⚠️ Level A required; full face SCBA mandatory; explosive-safe tools only; remote handling preferred |
| Isolation | ERG 112: isolate 500m minimum all directions; evacuate 1600m downwind if fire or explosion risk |
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 0129 — Lead azide, wetted HAZMAT RADIO NOTE — UN 0129
Product: Lead azide, wetted
Class 1 / Explosive 1.1A / ERG 112
PPE: Level A required; full face SCBA mandatory; explosive-safe tools only; remote handling preferred
ISOLATION: ERG 112: isolate 500m minimum all directions; evacuate 1600m downwind if fire or explosion risk
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 0129 — Lead azide, wetted
Class: 1 | Placard: Explosive 1.1A | ERG Guide: 112
Appearance: White to buff-colored crystalline powder or small crystals. Odorless. Supplied wetted with water or alcohol for safety during transport and handling.
Water Reactivity: Stable when wetted with at least 20% water; dry material is extremely shock-sensitive and explosive
Extinguishing: Water spray only to keep wetted; no foam, CO2, or dry chemical on dry material
PPE: Level A required; full face SCBA mandatory; explosive-safe tools only; remote handling preferred
Isolation: ERG 112: isolate 500m minimum all directions; evacuate 1600m downwind if fire or explosion risk
— 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/0129 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0129 Lead azide, wetted Cls1 ERG112 | ERG 112: isolate 500m minimum all directions; evacuate 1600m downwind if fire or | allfirefighter.com/hazmat/un/0129SMS / 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/0129
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.
Level A required; full face SCBA mandatory; explosive-safe tools only; remote handling preferred
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.