☣️ UN 0222 • CLASS 1
Ammonium nitrate, with more than 0.2% combustible
Placard: Explosive 1.1D. 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.
Advertisement
Quick details
UN 0222
Class: 1
Placard type: Explosive 1.1D
ERG: Guide 112 (check current ERG)
Isolation: ERG 112: Isolate 500m (1600 ft) in all directions. Evacuate 1600m (1 mile) downwind if fire involves explosives. Consider mass evacuation for large quantities involved in fire.
Chemical & Response Details
| Also known as | Ammonium nitrate fertilizerNitric acid ammonium saltANNorway saltpeterAmmonium saltpeter |
| CAS Number | 6484-52-2 |
| Appearance | White to grayish-white crystalline solid or granular material. Odorless or slight ammonia odor. Hygroscopic (absorbs moisture from air). |
| Flash Point | Not applicable (oxidizing solid) |
| Boiling Point | 210C (410F) - decomposes before boiling |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water; dissolves with slight cooling effect. No violent reaction but creates oxidizing solution. |
| Extinguishing | Do not use water or foam on mass fire. If fire must be fought, use flooding quantities of water from distance or unmanned hose holders. |
| PPE | ⚠️ Level A minimum for fire conditions; SCBA with full structural firefighting protective clothing. Blast-resistant barriers recommended. Do not approach burning material. |
| Isolation | ERG 112: Isolate 500m (1600 ft) in all directions. Evacuate 1600m (1 mile) downwind if fire involves explosives. Consider mass evacuation for large quantities involved in fire. |
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.
Advertisement
📋 Copy & Share
UN 0222 — Ammonium nitrate, with more than 0.2% co HAZMAT RADIO NOTE — UN 0222
Product: Ammonium nitrate, with more than 0.2% combustible
Class 1 / Explosive 1.1D / ERG 112
PPE: Level A minimum for fire conditions; SCBA with full structural firefighting protective clothing. Blast-resistant barriers recommended. Do not approach burning material.
ISOLATION: ERG 112: Isolate 500m (1600 ft) in all directions. Evacuate 1600m (1 mile) downwind if fire involves explosives. Consider mass evacuation for large quantities involved in fire.
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 0222 — Ammonium nitrate, with more than 0.2% combustible
Class: 1 | Placard: Explosive 1.1D | ERG Guide: 112
Appearance: White to grayish-white crystalline solid or granular material. Odorless or slight ammonia odor. Hygroscopic (absorbs moisture from air).
Water Reactivity: Soluble in water; dissolves with slight cooling effect. No violent reaction but creates oxidizing solution.
Extinguishing: Do not use water or foam on mass fire. If fire must be fought, use flooding quantities of water from distance or unmanned hose holders.
PPE: Level A minimum for fire conditions; SCBA with full structural firefighting protective clothing. Blast-resistant barriers recommended. Do not approach burning material.
Isolation: ERG 112: Isolate 500m (1600 ft) in all directions. Evacuate 1600m (1 mile) downwind if fire involves explosives. Consider mass evacuation for large quantities involved in fire.
— 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/0222 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN0222 Ammonium nitrate, with more than 0.2% combustible Cls1 ERG112 | allfirefighter.com/hazmat/un/0222SMS / 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/0222
Related UN numbers (same class)
Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.
Advertisement
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 minimum for fire conditions; SCBA with full structural firefighting protective clothing. Blast-resistant barriers recommended. Do not approach burning material.
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.