☣️ UN 1449 • CLASS 5
UN 1449 — Barium peroxide
Placard: Oxidizer. ERG Guide 141. 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.
Barium peroxide is a highly reactive substance that can accelerate burning when involved in a fire. It may also explode from heat or contamination.
Hazard overview: Barium peroxide can cause severe irritation to skin and eyes. It can also release toxic fumes when heated or contaminated.
Response guidance: In case of fire, use dry chemical, sand, or dry dolomite to extinguish. Do not use water or foam directly on the material.
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UN 1449 Quick Details
UN 1449
Product name: Barium peroxide
DOT Class: 5
Placard type: Oxidizer
ERG Guide: 141 (check current ERG)
Initial isolation: ERG 141: isolate spill area 25-50m all directions; if tank/rail car involved in fire isolate 800m all directions
Common Hazards of UN 1449
- These substances will accelerate burning when involved in a fire.
- May explode from heat or contamination.
- Some may burn rapidly.
- 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.
- Toxic by ingestion.
Chemical Identity & Physical Properties
Barium peroxide is a grayish-white to white odorless powder or granular solid with high density.
| Also known as | Barium dioxideBarium binoxideBarium superoxidePeroxide de baryum |
| CAS Number | 1304-29-6 |
| Appearance | Grayish-white to white odorless powder or granular solid at room temperature. Oxidizing solid with high density. |
| Flash Point | Not applicable (oxidizing solid) |
| Boiling Point | Not applicable (decomposes at 800C/1472F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts with water releasing oxygen and forming barium hydroxide; avoid direct water application |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1449
Extinguishing Media
Dry chemical, sand, dry dolomite; do not use water or foam directly on material
PPE Requirements
⚠️ Level B minimum; SCBA required; chemical-resistant gloves and boots; avoid skin contact with dust
Use Level B minimum personal protective equipment, including SCBA, chemical-resistant gloves, and boots, to avoid contact with the substance.
Isolation & Evacuation
ERG 141: isolate spill area 25-50m all directions; if tank/rail car involved in fire isolate 800m all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 141).
First Actions for a UN 1449 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).
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📋 Copy & Share Field Card
UN 1449 — Barium peroxideHAZMAT RADIO NOTE — UN 1449
Product: Barium peroxide
Class 5 / Oxidizer / ERG 141
PPE: Level B minimum; SCBA required; chemical-resistant gloves and boots; avoid skin contact with dust
ISOLATION: ERG 141: isolate spill area 25-50m all directions; if tank/rail car involved in fire isolate 800m 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 1449 — Barium peroxide
Class: 5 | Placard: Oxidizer | ERG Guide: 141
Appearance: Grayish-white to white odorless powder or granular solid at room temperature. Oxidizing solid with high density.
Water Reactivity: Reacts with water releasing oxygen and forming barium hydroxide; avoid direct water application
Extinguishing: Dry chemical, sand, dry dolomite; do not use water or foam directly on material
PPE: Level B minimum; SCBA required; chemical-resistant gloves and boots; avoid skin contact with dust
Isolation: ERG 141: isolate spill area 25-50m all directions; if tank/rail car involved in fire isolate 800m all directions
— Key Hazards —
• These substances will accelerate burning when involved in a fire.
• May explode from heat or contamination.
• Some may burn rapidly.
— 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/barium-peroxide-un-1449 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1449 Barium peroxide Cls5 ERG141 | allfirefighter.com/hazmat/un/barium-peroxide-un-1449SMS / 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/barium-peroxide-un-1449
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Frequently Asked Questions about UN 1449
No, but it can accelerate burning when involved in a fire.
Yes, it may explode from heat or contamination.
Isolate the spill area at least 25-50m in all directions, and evacuate 800m downwind if the spill involves a tank or rail car.
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.