UN 1892 — Ethyldichloroarsine
Placard: Toxic. ERG Guide 151. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 1892 is Ethyldichloroarsine, a highly toxic arsenical vesicant liquid assigned to ERG Guide 151. It can injure skin, eyes and lungs and may leave persistent arsenic contamination.
Hazard overview: UN 1892 presents severe toxic inhalation, skin absorption, blistering, heavy-vapor and arsenic-contaminated runoff hazards. Treat residues and decon water as highly toxic.
Response guidance: For a UN 1892 incident, responders should verify the product with shipping papers, package markings, SDS and ERG Guide 151. Establish incident command, isolate the area, stay upwind, prevent incompatible contact, control runoff and choose entry or fire-control actions based on monitoring, SDS and local SOP.
Firefighter training notes: Training for UN 1892 should emphasize persistent toxic contamination, dust or liquid control, skin absorption, runoff containment, decontamination waste and exposure documentation. Use ERG 151, SDS and local SOP.
Regulatory context: Ethyldichloroarsine is regulated as a hazardous material for transportation and emergency response purposes. Transportation, workplace exposure, spill reporting, waste handling, storage and environmental requirements may vary by formulation, concentration, quantity and jurisdiction. Verify current requirements through shipping papers, SDS, facility documents and applicable DOT, OSHA, EPA, NFPA, state or local authority guidance.
Storage & handling: Ethyldichloroarsine should be stored in tightly closed compatible containers in a secure toxic-material area with secondary containment, dust control, restricted access and waste/decontamination planning according to SDS.
UN 1892 Quick Details
Common Hazards of UN 1892
- HIGHLY TOXIC arsenical vesicant liquid; inhalation, ingestion or skin absorption may be fatal.
- Can cause blistering, severe eye injury and respiratory tract damage.
- Vapors are much heavier than air and may collect in low or confined areas.
- Hydrolysis or fire may produce toxic arsenic-containing residues and corrosive gases.
- Runoff may spread persistent arsenic contamination.
- Containers may rupture or fail when heated.
- Avoid all skin contact and treat residues as highly toxic contamination.
Chemical Identity & Physical Properties
Colorless to pale yellow liquid with a fruity or biting odor. Highly volatile at room temperature. Vesicant agent (blister agent) historically used as chemical warfare agent.
| Also known as | EthyldichloroarsineDichloroethylarsineEDEthylarsine dichlorideTL 214 |
| CAS Number | 598-14-1 |
| Appearance | Colorless to pale yellow liquid with a fruity or biting odor. Highly volatile at room temperature. Vesicant agent (blister agent) historically used as chemical warfare agent. |
| Flash Point | Not readily combustible, but will burn if involved in fire |
| Boiling Point | 156C (313F) |
| Vapor Density | 6.6 (much heavier than air) |
| Water Reactivity | Hydrolyzes slowly in water producing toxic and corrosive gases |
Fireground Response Guidance — UN 1892
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA and fully encapsulating chemical protective clothing for close entry or unknown concentrations. Level A may be needed; decontamination should address highly toxic/corrosive residues and runoff.
Isolation & Evacuation
First Actions for a UN 1892 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, fumes, dust, mist or spray and avoid skin or eye contact.
- Do not touch or walk through spilled material unless properly trained and wearing appropriate protective equipment.
- Prevent contaminated dust, liquid, 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 leak area and expand the perimeter if vapor, dust, fire involvement, water reaction or unknown concentration is present.
- Use ERG Guide 151, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 1892 — EthyldichloroarsineUse 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.