☣️ UN 3552 • CLASS 9
UN 3552 — Sodium ion batteries contained in equipment
Placard: Lithium Battery / Miscellaneous. ERG Guide 147. 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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UN 3552 Quick Details
UN 3552
Product name: Sodium ion batteries contained in equipment
DOT Class: 9
Placard type: Lithium Battery / Miscellaneous
ERG Guide: 147 (check current ERG)
Initial isolation: ERG 147: isolate 25m all directions; if fire or damaged, isolate 800m and consider evacuation for 800m downwind
Common Hazards of UN 3552
- 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
| Also known as | Na-ion batteriesSodium-ion cellsSodium battery packsEquipment with sodium batteries |
| Appearance | Manufactured electrochemical devices typically in cylindrical or prismatic form, containing sodium-based electrolyte. Batteries are housed within electronic equipment. |
| Flash Point | Not applicable (manufactured article containing flammable electrolyte internally) |
| Boiling Point | Not applicable (manufactured article) |
| Vapor Density | Not applicable (manufactured article) |
| Water Reactivity | Electrolyte may react with water if cell is compromised; avoid flooding damaged batteries |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3552
Extinguishing Media
Dry chemical, CO2, sand, or vermiculite for small fires; copious water for cooling in large fires
PPE Requirements
⚠️ Level C minimum; SCBA if thermal runaway or fire; face shield and insulated gloves for handling damaged units
Isolation & Evacuation
ERG 147: isolate 25m all directions; if fire or damaged, isolate 800m and consider evacuation for 800m downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 147).
First Actions for a UN 3552 Incident
- 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 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 3552 — Sodium ion batteries contained in equipmHAZMAT RADIO NOTE — UN 3552
Product: Sodium ion batteries contained in equipment
Class 9 / Lithium Battery / Miscellaneous / ERG 147
PPE: Level C minimum; SCBA if thermal runaway or fire; face shield and insulated gloves for handling damaged units
ISOLATION: ERG 147: isolate 25m all directions; if fire or damaged, isolate 800m and consider evacuation for 800m downwind
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 3552 — Sodium ion batteries contained in equipment
Class: 9 | Placard: Lithium Battery / Miscellaneous | ERG Guide: 147
Appearance: Manufactured electrochemical devices typically in cylindrical or prismatic form, containing sodium-based electrolyte. Batteries are housed within electronic equipment.
Water Reactivity: Electrolyte may react with water if cell is compromised; avoid flooding damaged batteries
Extinguishing: Dry chemical, CO2, sand, or vermiculite for small fires; copious water for cooling in large fires
PPE: Level C minimum; SCBA if thermal runaway or fire; face shield and insulated gloves for handling damaged units
Isolation: ERG 147: isolate 25m all directions; if fire or damaged, isolate 800m and consider evacuation for 800m downwind
— 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 —
• 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/3552 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3552 Sodium ion batteries contained in equipment Cls9 ERG147 | allfirefighter.com/hazmat/un/3552SMS / 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/3552
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Frequently Asked Questions about UN 3552
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.
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 C minimum; SCBA if thermal runaway or fire; face shield and insulated gloves for handling damaged units
Water reactivity: Electrolyte may react with water if cell is compromised; avoid flooding damaged batteries. Recommended extinguishing: Dry chemical, CO2, sand, or vermiculite for small fires; copious water for cooling in large fires.
ERG Guide 147 recommendation: ERG 147: isolate 25m all directions; if fire or damaged, isolate 800m and consider evacuation for 800m downwind
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 147 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.