☣️ UN 1504 • CLASS 5
Sodium 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 1504
Class: 5
Placard type: Oxidizer
ERG: Guide 144 (check current ERG)
Isolation: ERG 144: isolate spill 25m (75ft) all directions; for large spill isolate 50m (150ft) initially, then increase if needed; evacuate immediate area if fire involves material
Chemical & Response Details
| Also known as | Sodium dioxideDisodium peroxideDisodium dioxideSodium superoxide |
| CAS Number | 1313-60-6 |
| Appearance | White to yellowish-white granular powder or beads. Odorless. Solid at room temperature. |
| Flash Point | Not applicable (inorganic oxidizer) |
| Boiling Point | Not applicable (decomposes above 460C/860F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Reacts violently with water, generating heat and oxygen gas; may ignite combustibles; produces corrosive sodium hydroxide solution |
| Extinguishing | Dry sand, dry chemical, soda ash; do not use water, foam, or CO2 |
| PPE | ⚠️ Level B minimum with full-face SCBA; chemical-resistant suit required; avoid all skin/eye contact with material and solutions |
| Isolation | ERG 144: isolate spill 25m (75ft) all directions; for large spill isolate 50m (150ft) initially, then increase if needed; evacuate immediate area if fire involves material |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- May ignite combustibles (wood, paper, oil, clothing, etc.).
- React vigorously and/or explosively with water.
- Produce toxic and/or corrosive substances on contact with water.
- Flammable/toxic gases may accumulate in tanks and hopper cars.
- Some may produce flammable hydrogen gas upon contact with metals.
- Containers may explode when heated.
- Runoff may create fire or explosion hazard.
- TOXIC; inhalation or contact with vapor, substance, or decomposition products may cause severe injury
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
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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UN 1504 — Sodium peroxide HAZMAT RADIO NOTE — UN 1504
Product: Sodium peroxide
Class 5 / Oxidizer / ERG 144
PPE: Level B minimum with full-face SCBA; chemical-resistant suit required; avoid all skin/eye contact with material and solutions
ISOLATION: ERG 144: isolate spill 25m (75ft) all directions; for large spill isolate 50m (150ft) initially, then increase if needed; evacuate immediate area if fire involves material
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 1504 — Sodium peroxide
Class: 5 | Placard: Oxidizer | ERG Guide: 144
Appearance: White to yellowish-white granular powder or beads. Odorless. Solid at room temperature.
Water Reactivity: Reacts violently with water, generating heat and oxygen gas; may ignite combustibles; produces corrosive sodium hydroxide solution
Extinguishing: Dry sand, dry chemical, soda ash; do not use water, foam, or CO2
PPE: Level B minimum with full-face SCBA; chemical-resistant suit required; avoid all skin/eye contact with material and solutions
Isolation: ERG 144: isolate spill 25m (75ft) all directions; for large spill isolate 50m (150ft) initially, then increase if needed; evacuate immediate area if fire involves material
— Key Hazards —
• May ignite combustibles (wood, paper, oil, clothing, etc.).
• React vigorously and/or explosively with water.
• Produce toxic and/or corrosive substances on contact with water.
— 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/1504 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1504 Sodium peroxide Cls5 ERG144 | ERG 144: isolate spill 25m (75ft) all directions; for large spill isolate 50m (1 | allfirefighter.com/hazmat/un/1504SMS / 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/1504
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FAQ
May ignite combustibles (wood, paper, oil, clothing, etc.). React vigorously and/or explosively with water. Produce toxic and/or corrosive substances on contact with water. Flammable/toxic gases may accumulate in tanks and hopper cars. Some may produce flammable hydrogen gas upon contact with metals. Containers may explode when heated. Runoff may create fire or explosion hazard. TOXIC; inhalation or contact with vapor, substance, or decomposition products may cause severe injury
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 with full-face SCBA; chemical-resistant suit required; avoid all skin/eye contact with material and solutions
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 144 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.