☣️ 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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⚠️ 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 3552 is Sodium ion batteries contained in equipment, 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: Sodium ion batteries contained in equipment 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.

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

Manufactured electrochemical devices typically in cylindrical or prismatic form, containing sodium-based electrolyte. Batteries are housed within electronic equipment.

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

Level C minimum; SCBA if thermal runaway or fire; face shield and insulated gloves for handling damaged units. Select final PPE using ERG guidance, SDS, monitoring and incident command.

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

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.

📋 Copy & Share Field Card

UN 3552 — Sodium ion batteries contained in equipm

HAZMAT 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.

SMS WhatsApp

=== 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 — • 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/sodium-ion-batteries-contained-un-3552 | Always use current ERG + SOP/SOGIC BRIEFING

Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.

SMS (short)

UN3552 Sodium ion batteries contained in equipment Cls9 ERG147 | allfirefighter.com/hazmat/un/sodium-ion-batteries-contained-un-3552SMS / 160 CHAR

Use for: Quick text to command or incoming units. Fits in a single SMS.

Open in Messages WhatsApp

⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions. Page: https://allfirefighter.com/hazmat/un/sodium-ion-batteries-contained-un-3552

Related UN Numbers in Class 9

Open Class Guide →Hazmat Hub →

UN 1350 UN 1365 UN 1841 UN 1845 UN 1931 UN 1941 UN 1990 UN 2071 UN 2211 UN 2212 UN 2216 UN 2315

Discovery block for training / quick reference. Always consult the current ERG + your SOP/SOG for operations.

Frequently Asked Questions about UN 3552

UN 3552 is Sodium ion batteries contained in equipment, assigned to ERG Guide 147.

ERG Guide 147 applies for initial isolation, protective actions and first response guidance.

Sodium ion batteries contained in equipment can release flammable electrolyte and toxic smoke if damaged, overheated or involved in thermal runaway.

Level C minimum; SCBA if thermal runaway or fire; face shield and insulated gloves for handling damaged units.

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.