☣️ UN 2226 • CLASS 8
Benzotrichloride
Placard: Corrosive. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ 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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Quick details
UN 2226
Class: 8
Placard type: Corrosive
ERG: Guide 156 (check current ERG)
Isolation: ERG 156: isolate spill 25-50m all directions; large spill isolate 800m downwind, consider evacuation 1600m if tank/rail car involved in fire
Chemical & Response Details
| Also known as | BenzotrichlorideBenzenyl trichloridePhenyl chloroformα,α,α-TrichlorotolueneTrichloromethylbenzene |
| CAS Number | 98-07-7 |
| Appearance | Colorless to yellowish oily liquid with a penetrating, irritating odor. Fumes in moist air due to hydrolysis. |
| Flash Point | 127C (260F) |
| Boiling Point | 214C (417F) |
| Vapor Density | 6.8 (much heavier than air) |
| Water Reactivity | Reacts with water and moisture releasing HCl (hydrochloric acid) fumes and heat; reaction is vigorous but not violently explosive |
| Extinguishing | Dry chemical, CO2, or dry sand; avoid water streams due to reactivity |
| PPE | ⚠️ Level A or B with SCBA required; full chemical protective suit due to corrosive vapors and liquid contact hazard |
| Isolation | ERG 156: isolate spill 25-50m all directions; large spill isolate 800m downwind, consider evacuation 1600m if tank/rail car involved in fire |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- Combustible material: may burn but does not ignite readily.
- Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
- When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapors may travel to source of ignition and flash back.
- Corrosives in contact with metals may evolve flammable hydrogen gas.
- Containers may explode when heated or if contaminated with water.
- TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
First actions (field-minded)
- 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 in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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UN 2226 — Benzotrichloride HAZMAT RADIO NOTE — UN 2226
Product: Benzotrichloride
Class 8 / Corrosive / ERG 156
PPE: Level A or B with SCBA required; full chemical protective suit due to corrosive vapors and liquid contact hazard
ISOLATION: ERG 156: isolate spill 25-50m all directions; large spill isolate 800m downwind, consider evacuation 1600m if tank/rail car involved in fire
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 2226 — Benzotrichloride
Class: 8 | Placard: Corrosive | ERG Guide: 156
Appearance: Colorless to yellowish oily liquid with a penetrating, irritating odor. Fumes in moist air due to hydrolysis.
Water Reactivity: Reacts with water and moisture releasing HCl (hydrochloric acid) fumes and heat; reaction is vigorous but not violently explosive
Extinguishing: Dry chemical, CO2, or dry sand; avoid water streams due to reactivity
PPE: Level A or B with SCBA required; full chemical protective suit due to corrosive vapors and liquid contact hazard
Isolation: ERG 156: isolate spill 25-50m all directions; large spill isolate 800m downwind, consider evacuation 1600m if tank/rail car involved in fire
— Key Hazards —
• Combustible material: may burn but does not ignite readily.
• Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff.
• When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
— 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/2226 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2226 Benzotrichloride Cls8 ERG156 | ERG 156: isolate spill 25-50m all directions; large spill isolate 800m downwind, | allfirefighter.com/hazmat/un/2226SMS / 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/2226
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FAQ
Combustible material: may burn but does not ignite readily. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas Vapors may travel to source of ignition and flash back. Corrosives in contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. TOXIC and/or CORROSIVE; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance
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 A or B with SCBA required; full chemical protective suit due to corrosive vapors and liquid contact hazard
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 156 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.