☣️ UN 3558 • CLASS 9
UN 3558 — Vehicle, sodium ion battery powered
Placard: Lithium Battery / Miscellaneous. ERG Guide 147. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ 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.
UN 3558 is Vehicle, sodium ion battery powered, assigned to ERG Guide 147. This entry should be verified with shipping papers, labels and the SDS before responders commit to close-range action.
Hazard overview: Vehicle, sodium ion battery powered can release flammable electrolyte and toxic smoke if damaged, overheated or involved in thermal runaway. Fire may spread from one cell or pack to nearby batteries or equipment.
Response guidance: Use ERG Guide 147, isolate damaged batteries, watch for thermal runaway and protect responders from smoke. Cool large fires from distance only under local SOP.
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UN 3558 Quick Details
UN 3558
Product name: Vehicle, sodium ion battery powered
DOT Class: 9
Placard type: Lithium Battery / Miscellaneous
ERG Guide: 147 (check current ERG)
Initial isolation: ERG 147: isolate spill or leak area immediately for at least 25 meters in all directions; if fire involved, isolate 800 meters in all directions and consider evacuation
Common Hazards of UN 3558
- Lithium ion and sodium ion batteries contain flammable liquid electrolyte that may vent, ignite and
- May burn rapidly with flare-burning effect.
- May ignite other batteries in close proximity.
- Contact with battery electrolyte may be irritating to skin, eyes and mucous membranes.
- Fire will produce irritating, corrosive and/or toxic gases.
- Burning batteries may produce toxic hydrogen fluoride gas (see GUIDE 125).
- Fumes may cause dizziness or asphyxiation.
Chemical Identity & Physical Properties
Complete vehicle or vehicle components containing sodium-ion battery systems. The batteries consist of metallic cells and modules with liquid electrolyte, typically appearing as sealed metal casings in various configurations.
| Also known as | Sodium-ion battery vehicleNa-ion battery powered vehicleSodium battery electric vehicleVehicle containing sodium ion batteries |
| Appearance | Complete vehicle or vehicle components containing sodium-ion battery systems. The batteries consist of metallic cells and modules with liquid electrolyte, typically appearing as sealed metal casings in various configurations. |
| Flash Point | Not applicable (complete vehicle assembly with sealed battery cells) |
| Boiling Point | Not applicable (complete vehicle assembly) |
| Vapor Density | Not applicable (complete vehicle assembly) |
| Water Reactivity | Do not use water on burning batteries; electrolyte may react with water producing toxic vapors |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3558
Extinguishing Media
Dry chemical, CO2, sand, dry powder; large amounts of water may be needed for cooling surrounding batteries if fire occurs
PPE Requirements
⚠️ Level B minimum for battery fire or damage; SCBA required due to toxic vapors from burning electrolyte; thermal protection for fire scenarios
Level B minimum for battery fire or damage; SCBA required due to toxic vapors from burning electrolyte; thermal protection for fire scenarios. Select final PPE using ERG guidance, SDS, monitoring and incident command.
Isolation & Evacuation
ERG 147: isolate spill or leak area immediately for at least 25 meters in all directions; if fire involved, isolate 800 meters in all directions and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 147).
First Actions for a UN 3558 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 for at least 25 meters (75 feet) in all directions.
- Increase the immediate precautionary measure distance, in the downwind direction, as necessary.
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📋 Copy & Share Field Card
UN 3558 — Vehicle, sodium ion battery poweredHAZMAT RADIO NOTE — UN 3558
Product: Vehicle, sodium ion battery powered
Class 9 / Lithium Battery / Miscellaneous / ERG 147
PPE: Level B minimum for battery fire or damage; SCBA required due to toxic vapors from burning electrolyte; thermal protection for fire scenarios
ISOLATION: ERG 147: isolate spill or leak area immediately for at least 25 meters in all directions; if fire involved, isolate 800 meters in all directions and consider evacuation
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 3558 — Vehicle, sodium ion battery powered
Class: 9 | Placard: Lithium Battery / Miscellaneous | ERG Guide: 147
Appearance: Complete vehicle or vehicle components containing sodium-ion battery systems. The batteries consist of metallic cells and modules with liquid electrolyte, typically appearing as sealed metal casings in various configurations.
Water Reactivity: Do not use water on burning batteries; electrolyte may react with water producing toxic vapors
Extinguishing: Dry chemical, CO2, sand, dry powder; large amounts of water may be needed for cooling surrounding batteries if fire occurs
PPE: Level B minimum for battery fire or damage; SCBA required due to toxic vapors from burning electrolyte; thermal protection for fire scenarios
Isolation: ERG 147: isolate spill or leak area immediately for at least 25 meters in all directions; if fire involved, isolate 800 meters in all directions and consider evacuation
— Key Hazards —
• Lithium ion and sodium ion batteries contain flammable liquid electrolyte that may vent, ignite and
• May burn rapidly with flare-burning effect.
• May ignite other batteries in close proximity.
— 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 for at least 25 meters (75 feet) in all directions.
SOURCE: allfirefighter.com/hazmat/un/vehicle-sodium-ion-battery-un-3558 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3558 Vehicle, sodium ion battery powered Cls9 ERG147 | allfirefighter.com/hazmat/un/vehicle-sodium-ion-battery-un-3558SMS / 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/vehicle-sodium-ion-battery-un-3558
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Frequently Asked Questions about UN 3558
UN 3558 is Vehicle, sodium ion battery powered, assigned to ERG Guide 147.
ERG Guide 147 applies for initial isolation, protective actions and first response guidance.
Vehicle, sodium ion battery powered can release flammable electrolyte and toxic smoke if damaged, overheated or involved in thermal runaway.
Level B minimum for battery fire or damage; SCBA required due to toxic vapors from burning electrolyte; thermal protection for fire scenarios.
ERG 147: isolate spill or leak area immediately for at least 25 meters in all directions; if fire involved, isolate 800 meters in all directions and consider evacuation.
Water compatibility depends on the specific contents and incident conditions. Check ERG 147, SDS and incident command before applying water.
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.