☣️ UN 1044 • CLASS 2
UN 1044 — Fire extinguishers with compressed or liquefied gas
Placard: Non-Flammable Gas. ERG Guide 126. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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.
Fire extinguishers with compressed or liquefied gas are non-flammable and do not ignite readily, but the containers may explode when heated. The extinguishers are typically metal cylinders of various sizes containing compressed or liquefied gases.
Hazard overview: Some fire extinguishers may burn, but none ignite readily, and the containers may explode when heated, releasing the compressed or liquefied gas. The explosion can cause severe injury or damage.
Response guidance: In case of a spill or leak, isolate the area immediately and evacuate downwind. Do not apply external agents to intact cylinders, and treat ruptured cylinders based on their contents.
Advertisement
UN 1044 Quick Details
UN 1044
Product name: Fire extinguishers with compressed or liquefied gas
DOT Class: 2
Placard type: Non-Flammable Gas
ERG Guide: 126 (check current ERG)
Initial isolation: ERG 126: isolate spill/leak area immediately for at least 25-50m in all directions; if fire or large leak, consider initial evacuation for 800m in all directions
Common Hazards of UN 1044
- Some may burn but none ignite readily.
- Containers may explode when heated.
- Ruptured cylinders may rocket.
- Vapors may cause dizziness or asphyxiation without warning, especially when in closed or confined areas.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
- Fire may produce irritating, corrosive and/or toxic gases.
Chemical Identity & Physical Properties
The fire extinguishers are metal cylinders of various sizes containing compressed or liquefied gases, such as CO2, halon, halogenated agents, or nitrogen, and may be red, chrome, or other colors depending on the agent type.
| Also known as | compressed gas fire extinguishersliquefied gas fire extinguishersportable fire extinguisherspressurized fire extinguisher unitsgas-charged fire suppression devices |
| Appearance | Metal cylinders of various sizes containing compressed or liquefied gases (CO2, halon, halogenated agents, or nitrogen). May be red, chrome, or other colors depending on agent type. Cylindrical pressure vessels with discharge nozzle/horn. |
| Flash Point | Not applicable (pressurized gas device) |
| Boiling Point | Not applicable (varies by extinguishing agent) |
| Vapor Density | Not applicable (pressurized container) |
| Water Reactivity | No significant reaction with container; contents depend on specific extinguishing agent |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1044
Extinguishing Media
Do not apply external agents to intact cylinders; if ruptured treat based on contents (CO2, dry chemical, or halogenated agent)
PPE Requirements
⚠️ Level D for intact units; Level C minimum if cylinders ruptured or leaking; SCBA if fire involved or enclosed space
Level D protective equipment is required for intact units, and Level C minimum for ruptured or leaking cylinders, with SCBA required if fire is involved or in an enclosed space.
Isolation & Evacuation
ERG 126: isolate spill/leak area immediately for at least 25-50m in all directions; if fire or large leak, consider initial evacuation for 800m in all directions
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 126).
First Actions for a UN 1044 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 100 meters (330 feet) in all directions.
- Consider initial downwind evacuation for at least 500 meters (1/3 mile).
Advertisement
📋 Copy & Share Field Card
UN 1044 — Fire extinguishers with compressed or liHAZMAT RADIO NOTE — UN 1044
Product: Fire extinguishers with compressed or liquefied gas
Class 2 / Non-Flammable Gas / ERG 126
PPE: Level D for intact units; Level C minimum if cylinders ruptured or leaking; SCBA if fire involved or enclosed space
ISOLATION: ERG 126: isolate spill/leak area immediately for at least 25-50m in all directions; if fire or large leak, consider initial evacuation for 800m in all directions
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 1044 — Fire extinguishers with compressed or liquefied gas
Class: 2 | Placard: Non-Flammable Gas | ERG Guide: 126
Appearance: Metal cylinders of various sizes containing compressed or liquefied gases (CO2, halon, halogenated agents, or nitrogen). May be red, chrome, or other colors depending on agent type. Cylindrical pressure vessels with discharge nozzle/horn.
Water Reactivity: No significant reaction with container; contents depend on specific extinguishing agent
Extinguishing: Do not apply external agents to intact cylinders; if ruptured treat based on contents (CO2, dry chemical, or halogenated agent)
PPE: Level D for intact units; Level C minimum if cylinders ruptured or leaking; SCBA if fire involved or enclosed space
Isolation: ERG 126: isolate spill/leak area immediately for at least 25-50m in all directions; if fire or large leak, consider initial evacuation for 800m in all directions
— Key Hazards —
• Some may burn but none ignite readily.
• Containers may explode when heated.
• Ruptured cylinders may rocket.
— 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 100 meters (330 feet) in all directions.
SOURCE: allfirefighter.com/hazmat/un/fire-extinguishers-with-compressed-un-1044 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1044 Fire extinguishers with compressed or liquefied gas Cls2 ERG126 | allfirefighter.com/hazmat/un/fire-extinguishers-with-compressed-un-1044SMS / 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/fire-extinguishers-with-compressed-un-1044
Advertisement
Frequently Asked Questions about UN 1044
Yes, the containers of UN 1044 fire extinguishers may explode when heated, releasing the compressed or liquefied gas.
UN 1044 fire extinguishers contain compressed or liquefied gases such as CO2, halon, halogenated agents, or nitrogen.
Level D protective equipment is required for intact units, and Level C minimum for ruptured or leaking cylinders, with SCBA required if fire is involved or in an enclosed space.
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.