☣️ UN 0147 • CLASS 1
UN 0147 — Nitro urea
Placard: Explosive 1.1D. 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 0147 Quick Details
UN 0147
Product name: Nitro urea
DOT Class: 1
Placard type: Explosive 1.1D
ERG Guide: 112 (check current ERG)
Initial isolation: ERG 112: isolate 500m all directions for spill; evacuate 800m in all directions for fire; mass explosion hazard requires maximum standoff distance
Common Hazards of UN 0147
- 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 | NitroureaN-NitroureaNitrocarbamideCarbamide nitrateUrea nitrate |
| CAS Number | 556-89-8 |
| Appearance | White to pale yellow crystalline solid. Odorless or slight acidic odor. Stable when dry but highly sensitive to heat, shock, and friction when wet or contaminated. |
| Flash Point | Not applicable (explosive solid) |
| Boiling Point | Not applicable (decomposes explosively) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water; may become more sensitive when wet or in solution |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 0147
Extinguishing Media
Do not use water; dry sand or earth for small fires; withdraw and let large fires burn
PPE Requirements
⚠️ Level A required for spill response; full structural firefighter protective clothing only for fires; SCBA mandatory; evacuate all non-essential personnel
Isolation & Evacuation
ERG 112: isolate 500m all directions for spill; evacuate 800m in all directions for fire; mass explosion hazard requires maximum standoff distance
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 112).
First Actions for a UN 0147 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 0147 — Nitro ureaHAZMAT RADIO NOTE — UN 0147
Product: Nitro urea
Class 1 / Explosive 1.1D / ERG 112
PPE: Level A required for spill response; full structural firefighter protective clothing only for fires; SCBA mandatory; evacuate all non-essential personnel
ISOLATION: ERG 112: isolate 500m all directions for spill; evacuate 800m in all directions for fire; mass explosion hazard requires maximum standoff distance
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 0147 — Nitro urea
Class: 1 | Placard: Explosive 1.1D | ERG Guide: 112
Appearance: White to pale yellow crystalline solid. Odorless or slight acidic odor. Stable when dry but highly sensitive to heat, shock, and friction when wet or contaminated.
Water Reactivity: Soluble in water; may become more sensitive when wet or in solution
Extinguishing: Do not use water; dry sand or earth for small fires; withdraw and let large fires burn
PPE: Level A required for spill response; full structural firefighter protective clothing only for fires; SCBA mandatory; evacuate all non-essential personnel
Isolation: ERG 112: isolate 500m all directions for spill; evacuate 800m in all directions for fire; mass explosion hazard requires maximum standoff distance
— 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/0147 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0147 Nitro urea Cls1 ERG112 | ERG 112: isolate 500m all directions for spill; evacuate 800m in all directions | allfirefighter.com/hazmat/un/0147SMS / 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/0147
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 0147
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 for spill response; full structural firefighter protective clothing only for fires; SCBA mandatory; evacuate all non-essential personnel
Water reactivity: Soluble in water; may become more sensitive when wet or in solution. Recommended extinguishing: Do not use water; dry sand or earth for small fires; withdraw and let large fires burn.
ERG Guide 112 recommendation: ERG 112: isolate 500m all directions for spill; evacuate 800m in all directions for fire; mass explosion hazard requires maximum standoff distance
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.