☣️ UN 2071 • CLASS 9
Ammonium nitrate based fertilizer
Placard: Miscellaneous. 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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Quick details
UN 2071
Class: 9
Placard type: Miscellaneous
ERG: Guide 140 (check current ERG)
Isolation: ERG 140: Isolate spill area immediate 25-50m. If fire or large spill, isolate 800m all directions; consider evacuation 1600m downwind.
Chemical & Response Details
| Also known as | Ammonium nitrate fertilizerAN fertilizerNitrogen fertilizerNitram fertilizerAgricultural ammonium nitrate |
| Appearance | White to off-white or grayish granular solid or prills. Odorless or slight ammonia odor. Hygroscopic, absorbs moisture from air. |
| Flash Point | Not applicable (oxidizing solid) |
| Boiling Point | Decomposes at approximately 210C (410F) before boiling |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Dissolves readily in water; dissolution process is endothermic (absorbs heat). No violent reaction but contamination may cause decomposition. |
| Extinguishing | Water spray, fog, or regular foam acceptable for cooling. Do not use on burning product - floods of water only if burning. |
| PPE | ⚠️ Level B minimum during fire or decomposition. SCBA required. Full protective clothing. Avoid contamination with organic materials or fuels. |
| Isolation | ERG 140: Isolate spill area immediate 25-50m. If fire or large spill, isolate 800m all directions; consider evacuation 1600m downwind. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- These substances will accelerate burning when involved in a fire.
- Some may decompose explosively when heated or involved in a fire.
- May explode from heat or contamination.
- Some will react explosively with hydrocarbons (fuels).
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
First actions (field-minded)
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- Consider initial downwind evacuation for at least 100 meters (330 feet).
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UN 2071 — Ammonium nitrate based fertilizer HAZMAT RADIO NOTE — UN 2071
Product: Ammonium nitrate based fertilizer
Class 9 / Miscellaneous / ERG 140
PPE: Level B minimum during fire or decomposition. SCBA required. Full protective clothing. Avoid contamination with organic materials or fuels.
ISOLATION: ERG 140: Isolate spill area immediate 25-50m. If fire or large spill, isolate 800m all directions; consider evacuation 1600m 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 2071 — Ammonium nitrate based fertilizer
Class: 9 | Placard: Miscellaneous | ERG Guide: 140
Appearance: White to off-white or grayish granular solid or prills. Odorless or slight ammonia odor. Hygroscopic, absorbs moisture from air.
Water Reactivity: Dissolves readily in water; dissolution process is endothermic (absorbs heat). No violent reaction but contamination may cause decomposition.
Extinguishing: Water spray, fog, or regular foam acceptable for cooling. Do not use on burning product - floods of water only if burning.
PPE: Level B minimum during fire or decomposition. SCBA required. Full protective clothing. Avoid contamination with organic materials or fuels.
Isolation: ERG 140: Isolate spill area immediate 25-50m. If fire or large spill, isolate 800m all directions; consider evacuation 1600m downwind.
— Key Hazards —
• These substances will accelerate burning when involved in a fire.
• Some may decompose explosively when heated or involved in a fire.
• May explode from heat or contamination.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/2071 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2071 Ammonium nitrate based fertilizer Cls9 ERG140 | allfirefighter.com/hazmat/un/2071SMS / 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/2071
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FAQ
These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire. May explode from heat or contamination. Some will react explosively with hydrocarbons (fuels). May ignite combustibles (wood, paper, oil, clothing, etc.). Containers may explode when heated. Runoff may create fire or explosion hazard. Inhalation, ingestion or contact (skin, eyes) with vapors or substance may cause severe injury, burns or
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum during fire or decomposition. SCBA required. Full protective clothing. Avoid contamination with organic materials or fuels.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 140 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.