☣️ UN 2728 • CLASS 5
UN 2728 — Zirconium nitrate
Placard: Oxidizer. 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.
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UN 2728 Quick Details
UN 2728
Product name: Zirconium nitrate
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 140 (check current ERG)
Initial isolation: ERG 140: Isolate spill area immediate 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
Common Hazards of UN 2728
- 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
| Also known as | Zirconium(IV) nitrateNitric acid zirconium saltZirconium tetranitrateZirconyl nitrate |
| CAS Number | 13746-89-9 |
| Appearance | White to slightly yellow crystalline solid or hygroscopic powder. Odorless. Highly soluble in water and deliquescent (absorbs moisture from air). |
| Flash Point | Not applicable (oxidizing solid) |
| Boiling Point | Decomposes before boiling at approximately 100C (212F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Dissolves readily in water, generating heat. No violent reaction but solution is acidic and oxidizing. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2728
Extinguishing Media
Dry chemical, sand, or water spray. Avoid organic materials. Substance itself is an oxidizer that will intensify fires.
PPE Requirements
⚠️ Level B minimum for spills; Level A if fire involved. Full face SCBA required. Chemical-resistant suit and gloves mandatory due to oxidizing and corrosive properties.
Isolation & Evacuation
ERG 140: Isolate spill area immediate 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 140).
First Actions for a UN 2728 Incident
- 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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📋 Copy & Share Field Card
UN 2728 — Zirconium nitrateHAZMAT RADIO NOTE — UN 2728
Product: Zirconium nitrate
Class 5 / Oxidizer / ERG 140
PPE: Level B minimum for spills; Level A if fire involved. Full face SCBA required. Chemical-resistant suit and gloves mandatory due to oxidizing and corrosive properties.
ISOLATION: ERG 140: Isolate spill area immediate 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
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 2728 — Zirconium nitrate
Class: 5 | Placard: Oxidizer | ERG Guide: 140
Appearance: White to slightly yellow crystalline solid or hygroscopic powder. Odorless. Highly soluble in water and deliquescent (absorbs moisture from air).
Water Reactivity: Dissolves readily in water, generating heat. No violent reaction but solution is acidic and oxidizing.
Extinguishing: Dry chemical, sand, or water spray. Avoid organic materials. Substance itself is an oxidizer that will intensify fires.
PPE: Level B minimum for spills; Level A if fire involved. Full face SCBA required. Chemical-resistant suit and gloves mandatory due to oxidizing and corrosive properties.
Isolation: ERG 140: Isolate spill area immediate 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
— 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/2728 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2728 Zirconium nitrate Cls5 ERG140 | ERG 140: Isolate spill area immediate 50m in all directions. If tank/rail car in | allfirefighter.com/hazmat/un/2728SMS / 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/2728
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Frequently Asked Questions about UN 2728
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 for spills; Level A if fire involved. Full face SCBA required. Chemical-resistant suit and gloves mandatory due to oxidizing and corrosive properties.
Water reactivity: Dissolves readily in water, generating heat. No violent reaction but solution is acidic and oxidizing.. Recommended extinguishing: Dry chemical, sand, or water spray. Avoid organic materials. Substance itself is an oxidizer that will intensify fires..
ERG Guide 140 recommendation: ERG 140: Isolate spill area immediate 50m in all directions. If tank/rail car involved in fire, isolate 800m in all directions and consider evacuation for 800m in all directions.
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.