☣️ UN 2234 • CLASS 3
UN 2234 — Chlorobenzotrifluorides
Placard: Flammable. ERG Guide 130. 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.
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UN 2234 Quick Details
UN 2234
Product name: Chlorobenzotrifluorides
DOT Class: 3
Placard type: Flammable
ERG Guide: 130 (check current ERG)
Initial isolation: ERG 130: Initial isolation 50m in all directions; spills: evacuate 300m downwind; fire: evacuate 800m in all directions.
Common Hazards of UN 2234
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
- Vapors may travel to source of ignition and flash back.
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapor explosion hazard indoors, outdoors or in sewers.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Runoff to sewer may create fire or explosion hazard.
- Containers may explode when heated.
Chemical Identity & Physical Properties
| Also known as | para-Chlorobenzotrifluoride4-ChlorobenzotrifluoridePCBTFp-Chloro-alpha,alpha,alpha-trifluorotoluene4-Chloro-alpha,alpha,alpha-trifluorotoluene |
| CAS Number | 98-56-6 |
| Appearance | Colorless to pale yellow liquid with a mild aromatic odor. Denser than water and insoluble in water. |
| Flash Point | 46°C (115°F) |
| Boiling Point | 138-139°C (280-282°F) |
| Vapor Density | 6.3 (heavier than air) |
| Water Reactivity | No significant reaction with water; insoluble and will float or sink depending on isomer. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2234
Extinguishing Media
AFFF foam, alcohol-resistant foam, CO2, dry chemical, water spray for cooling
PPE Requirements
⚠️ Level B minimum for spill response; SCBA and full protective clothing for fire or confined space entry.
Isolation & Evacuation
ERG 130: Initial isolation 50m in all directions; spills: evacuate 300m downwind; fire: evacuate 800m in all directions.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 130).
First Actions for a UN 2234 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 50 meters (150 feet) in all directions.
- Consider initial downwind evacuation for at least 300 meters (1000 feet).
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📋 Copy & Share Field Card
UN 2234 — ChlorobenzotrifluoridesHAZMAT RADIO NOTE — UN 2234
Product: Chlorobenzotrifluorides
Class 3 / Flammable / ERG 130
PPE: Level B minimum for spill response; SCBA and full protective clothing for fire or confined space entry.
ISOLATION: ERG 130: Initial isolation 50m in all directions; spills: evacuate 300m downwind; fire: evacuate 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 2234 — Chlorobenzotrifluorides
Class: 3 | Placard: Flammable | ERG Guide: 130
Appearance: Colorless to pale yellow liquid with a mild aromatic odor. Denser than water and insoluble in water.
Water Reactivity: No significant reaction with water; insoluble and will float or sink depending on isomer.
Extinguishing: AFFF foam, alcohol-resistant foam, CO2, dry chemical, water spray for cooling
PPE: Level B minimum for spill response; SCBA and full protective clothing for fire or confined space entry.
Isolation: ERG 130: Initial isolation 50m in all directions; spills: evacuate 300m downwind; fire: evacuate 800m in all directions.
— Key Hazards —
• HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
• Vapors may travel to source of ignition and flash back.
— 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/2234 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2234 Chlorobenzotrifluorides Cls3 ERG130 | allfirefighter.com/hazmat/un/2234SMS / 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/2234
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Frequently Asked Questions about UN 2234
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated.
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 for spill response; SCBA and full protective clothing for fire or confined space entry.
Water reactivity: No significant reaction with water; insoluble and will float or sink depending on isomer.. Recommended extinguishing: AFFF foam, alcohol-resistant foam, CO2, dry chemical, water spray for cooling.
ERG Guide 130 recommendation: ERG 130: Initial isolation 50m in all directions; spills: evacuate 300m downwind; fire: evacuate 800m in all directions.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 130 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.