UN 3247 — Sodium peroxoborate, anhydrous
Placard: Oxidizer. ERG Guide 140. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3247 Sodium peroxoborate, anhydrous is assigned to ERG Guide 140 for initial emergency response. White to off-white granular powder or crystalline solid, odorless. Hygroscopic material that is stable at room temperature when dry. Verify the exact product from shipping papers and SDS before selecting tactics.
Hazard overview: Primary hazards: an oxidizing hazardous material that can intensify fire and react dangerously with combustibles. These substances will accelerate burning when involved in a fire. Some may decompose explosively when heated or involved in a fire.
Response guidance: For a UN 3247 incident, isolate the area, keep unauthorized personnel away, stay upwind/uphill and confirm the exact material from shipping papers and SDS. Use compatible extinguishing media and prevent contaminated runoff from entering waterways. Follow ERG Guide 140 and local incident command procedures.
UN 3247 Quick Details
Common Hazards of UN 3247
- 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 with vapors or substance may cause severe injury, burns or death.
Chemical Identity & Physical Properties
White to off-white granular powder or crystalline solid, odorless. Hygroscopic material that is stable at room temperature when dry.
| Also known as | Sodium perboratePeroxoborate de sodiumSodium peroxyborateSodium tetraborate peroxide |
| CAS Number | 7632-04-4 |
| Appearance | White to off-white granular powder or crystalline solid, odorless. Hygroscopic material that is stable at room temperature when dry. |
| Flash Point | Not applicable (oxidizing solid) |
| Boiling Point | Decomposes at approximately 60-70C (140-158F) releasing oxygen |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | Soluble in water, hydrolyzes to form hydrogen peroxide and borate; exothermic dissolution may occur |
Fireground Response Guidance — UN 3247
Extinguishing Media
PPE Requirements
Level C minimum for handling; SCBA and full protective clothing required for fire involvement; eye and skin protection mandatory
Isolation & Evacuation
First Actions for a UN 3247 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper if available.
- 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 25 meters (75 feet) for solids.
- Consider initial downwind evacuation for at least 100 meters (330 feet).
📋 Copy & Share Field Card
UN 3247 — Sodium peroxoborate, anhydrousUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.