☣️ UN 1449 • CLASS 5
Barium peroxide
Placard: Oxidizer. 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 1449
Class: 5
Placard type: Oxidizer
ERG: Guide 141 (check current ERG)
Isolation: ERG 141: isolate spill area 25-50m all directions; if tank/rail car involved in fire isolate 800m all directions
Chemical & Response Details
| 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 |
| 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 |
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.
- 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.
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 1449 — Barium peroxide HAZMAT 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 —
• 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/1449 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1449 Barium peroxide Cls5 ERG141 | ERG 141: isolate spill area 25-50m all directions; if tank/rail car involved in | allfirefighter.com/hazmat/un/1449SMS / 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/1449
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FAQ
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.
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; SCBA required; chemical-resistant gloves and boots; avoid skin contact with dust
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 141 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.