UN 2235 — Chlorobenzyl chlorides, liquid
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2235 is Chlorobenzyl chlorides, liquid, a toxic corrosive chlorinated liquid assigned to ERG Guide 153. Moisture can produce hydrogen chloride and corrosive runoff.
Hazard overview: TOXIC and CORROSIVE chlorobenzyl chloride liquid; inhalation, ingestion or skin/eye contact may cause severe injury. Reacts slowly with water or moisture to form hydrogen chloride and corrosive runoff. Combustible material: may burn but does not ignite readily.
Response guidance: For a UN 2235 incident, verify the product with shipping papers, container markings, SDS and ERG Guide 153. Establish incident command, isolate the area, stay upwind, control ignition or incompatibility hazards, prevent runoff, dust or vapor spread and base entry/fire-control actions on monitoring and local SOP.
Firefighter training notes: Training for UN 2235 should emphasize toxic skin/dust/vapor exposure, contaminated clothing, toxic fire products, decontamination waste and runoff containment. Use ERG 153, SDS and local SOP.
Regulatory context: Chlorobenzyl chlorides, liquid is regulated as a hazardous material for transportation and emergency response purposes. Storage, workplace exposure, emergency planning, spill reporting, waste handling and environmental requirements vary by exact product, concentration, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, container markings and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Chlorobenzyl chlorides, liquid should be stored in tightly closed compatible containers in a secure toxic-material area with secondary containment, restricted access, ventilation and waste/decontamination planning according to SDS.
UN 2235 Quick Details
Common Hazards of UN 2235
- TOXIC and CORROSIVE chlorobenzyl chloride liquid; inhalation, ingestion or skin/eye contact may cause severe injury.
- Reacts slowly with water or moisture to form hydrogen chloride and corrosive runoff.
- Combustible material: may burn but does not ignite readily.
- Vapors are heavier than air and may collect in low or confined areas.
- Fire may produce hydrogen chloride and other toxic/corrosive chlorinated gases.
- Runoff may carry toxic, corrosive chlorinated contamination.
- Avoid all skin and eye contact.
Chemical Identity & Physical Properties
Clear to pale yellow liquid with a pungent, irritating odor. Corrosive and toxic liquid at room temperature.
| Also known as | chlorobenzyl chloridebenzyl chloride chlorinatedchlorinated benzyl chloridealpha-chlorotoluene derivatives |
| Appearance | Clear to pale yellow liquid with a pungent, irritating odor. Corrosive and toxic liquid at room temperature. |
| Flash Point | >110C (>230F) |
| Boiling Point | 213-259C (415-498F) depending on isomer |
| Vapor Density | 5.5-6.5 (heavier than air) |
| Water Reactivity | Reacts slowly with water, producing HCl; avoid contact with moisture |
Fireground Response Guidance — UN 2235
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for dust, vapor, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing selected from SDS; avoid all skin contact.
Isolation & Evacuation
First Actions for a UN 2235 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Avoid breathing vapors, dust, mist, smoke or fumes and avoid skin or eye contact.
- Do not touch damaged containers or spilled material unless properly trained and wearing appropriate protective equipment.
- Prevent contaminated dust, liquid, residues, runoff and decontamination waste from spreading.
- Ventilate closed spaces before entering, but only if properly trained, equipped, monitored and authorized by incident command.
- Isolate the spill or release area and expand the perimeter for fire involvement, vapor spread, dust generation, water reaction or unknown product identity.
- Use ERG Guide 153, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 2235 — Chlorobenzyl chlorides, liquidUse 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.