☣️ UN 2422 • CLASS 2
UN 2422 — Refrigerant gas R-1318
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.
Advertisement
UN 2422 Quick Details
UN 2422
Product name: Refrigerant gas R-1318
DOT Class: 2
Placard type: Non-Flammable Gas
ERG Guide: 126 (check current ERG)
Initial isolation: ERG 126: isolate 100m all directions; if tank/rail car involved in fire, isolate 800m and evacuate
Common Hazards of UN 2422
- 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
| Also known as | OctafluorocyclobutanePerfluorocyclobutaneR-C318FC-C318Freon C318 |
| CAS Number | 115-25-3 |
| Appearance | Colorless, odorless gas at room temperature. Non-flammable compressed liquefied gas shipped under pressure. |
| Flash Point | Not applicable (non-flammable gas) |
| Boiling Point | -6C (21F) |
| Vapor Density | 7.0 (much heavier than air) |
| Water Reactivity | No significant reaction with water |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2422
Extinguishing Media
Not applicable; use CO2 or dry chemical for surrounding fires if needed
PPE Requirements
⚠️ Level B minimum with SCBA for leak or confined space; thermal protection if fire exposure
Isolation & Evacuation
ERG 126: isolate 100m all directions; if tank/rail car involved in fire, isolate 800m and evacuate
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 126).
First Actions for a UN 2422 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.
- Many gases are heavier than air and will spread along the ground and collect in low or confined areas
- 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 2422 — Refrigerant gas R-1318HAZMAT RADIO NOTE — UN 2422
Product: Refrigerant gas R-1318
Class 2 / Non-Flammable Gas / ERG 126
PPE: Level B minimum with SCBA for leak or confined space; thermal protection if fire exposure
ISOLATION: ERG 126: isolate 100m all directions; if tank/rail car involved in fire, isolate 800m and evacuate
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 2422 — Refrigerant gas R-1318
Class: 2 | Placard: Non-Flammable Gas | ERG Guide: 126
Appearance: Colorless, odorless gas at room temperature. Non-flammable compressed liquefied gas shipped under pressure.
Water Reactivity: No significant reaction with water
Extinguishing: Not applicable; use CO2 or dry chemical for surrounding fires if needed
PPE: Level B minimum with SCBA for leak or confined space; thermal protection if fire exposure
Isolation: ERG 126: isolate 100m all directions; if tank/rail car involved in fire, isolate 800m and evacuate
— Key Hazards —
• Some may burn but none ignite readily.
• Containers may explode when heated.
• Ruptured cylinders may rocket.
— 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.
• Many gases are heavier than air and will spread along the ground and collect in low or confined areas
SOURCE: allfirefighter.com/hazmat/un/2422 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2422 Refrigerant gas R-1318 Cls2 ERG126 | ERG 126: isolate 100m all directions; if tank/rail car involved in fire, isolate | allfirefighter.com/hazmat/un/2422SMS / 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/2422
Advertisement
Frequently Asked Questions about UN 2422
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.
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 B minimum with SCBA for leak or confined space; thermal protection if fire exposure
Water reactivity: No significant reaction with water. Recommended extinguishing: Not applicable; use CO2 or dry chemical for surrounding fires if needed.
ERG Guide 126 recommendation: ERG 126: isolate 100m all directions; if tank/rail car involved in fire, isolate 800m and evacuate
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 126 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.