☣️ UN 2071 • CLASS 9
UN 2071 — Ammonium nitrate based fertilizer
Placard: Miscellaneous. ERG Guide 140. 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.
Ammonium nitrate based fertilizer is a white to off-white or grayish granular solid or prills that is odorless or has a slight ammonia odor. It is highly hygroscopic, absorbing moisture from the air.
Hazard overview: These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire.
Response guidance: Use Level B minimum personal protective equipment during fire or decomposition. SCBA and full protective clothing are required, and avoid contamination with organic materials or fuels.
Advertisement
UN 2071 Quick Details
UN 2071
Product name: Ammonium nitrate based fertilizer
DOT Class: 9
Placard type: Miscellaneous
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: Isolate spill area immediate 25-50m. If fire or large spill, isolate 800m all directions; consider evacuation 1600m downwind.
Common Hazards of UN 2071
- 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
Chemical Identity & Physical Properties
White to off-white or grayish granular solid or prills. Odorless or slight ammonia odor. Hygroscopic, absorbs moisture from air.
| 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. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2071
Extinguishing Media
Water spray, fog, or regular foam acceptable for cooling. Do not use on burning product - floods of water only if burning.
PPE Requirements
⚠️ Level B minimum during fire or decomposition. SCBA required. Full protective clothing. Avoid contamination with organic materials or fuels.
Level B minimum during fire or decomposition. SCBA required. Full protective clothing. Avoid contamination with organic materials or fuels.
Isolation & Evacuation
ERG 140: Isolate spill area immediate 25-50m. If fire or large spill, isolate 800m all directions; consider evacuation 1600m downwind.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).
First Actions for a UN 2071 Incident
- 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).
Advertisement
📋 Copy & Share Field Card
UN 2071 — Ammonium nitrate based fertilizerHAZMAT 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 —
• 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
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.
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.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/ammonium-nitrate-based-fertilizer-un-2071
Advertisement
Frequently Asked Questions about UN 2071
Yes, these substances will accelerate burning when involved in a fire.
No violent reaction, but contamination may cause decomposition.
Level B minimum during fire or decomposition. SCBA required. Full protective clothing.
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.