UN 1006 — Argon, compressed
Placard: Non-Flammable Gas. ERG Guide 120. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
Compressed argon is a non-flammable gas that can cause dizziness or asphyxiation without warning, especially in closed or confined areas. It is essential to handle it with care and follow proper safety protocols.
Hazard overview: The vapors from the liquefied gas are initially heavier than air and spread along the ground, causing an asphyxiation hazard in confined spaces. Prolonged exposure can lead to severe health effects, including dizziness and loss of consciousness.
Response guidance: In case of an emergency, isolate the area, and use SCBA in confined spaces or oxygen-deficient atmospheres. It is essential to wear proper PPE, including insulated gloves for cryogenic liquid, to prevent cold burns and asphyxiation.
UN 1006 Quick Details
Common Hazards of UN 1006
- 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, liquefied gas or cryogenic liquids may cause burns, severe injury and/or frostbite.
- Non-flammable gases.
- Containers may explode when heated.
- Ruptured cylinders may rocket.
Chemical Identity & Physical Properties
Argon is a colorless, odorless, and tasteless inert gas, shipped as a compressed gas or cryogenic liquid, and is heavier than air.
| Also known as | Argon gasCompressed argonRefrigerated argonAr |
| CAS Number | 7440-37-1 |
| Appearance | Colorless, odorless, tasteless inert gas. Shipped as a compressed gas or cryogenic liquid. Heavier than air. |
| Flash Point | Not applicable (inert gas) |
| Boiling Point | -186C (-303F) |
| Vapor Density | 1.4 (heavier than air) |
| Water Reactivity | No reaction; inert gas |
Fireground Response Guidance — UN 1006
Extinguishing Media
PPE Requirements
Level D PPE is recommended for routine handling, and SCBA is required in confined spaces or oxygen-deficient atmospheres to prevent asphyxiation.
Isolation & Evacuation
First Actions for a UN 1006 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 100 meters (330 feet).
📋 Copy & Share Field Card
UN 1006 — Argon, compressedUse 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.