UN 2490 — Dichloroisopropyl ether
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2490 At a Glance
UN 2490 (Dichloroisopropyl ether) is listed as DOT Class 6 Toxic and is assigned to ERG Guide 153. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
UN 2490 is Dichloroisopropyl ether, a toxic chlorinated ether assigned to ERG Guide 153. Dense liquid spread and toxic chlorinated fire products are key hazards.
Hazard overview: TOXIC chlorinated ether liquid; inhalation, ingestion or skin contact may cause severe injury. Combustible material: may burn but does not ignite readily. When heated, vapors may form explosive mixtures and collect in low or confined areas.
Response guidance: For UN 2490, isolate the area, avoid skin contact and use SCBA where vapor, dust, mist or fire is present. Contain toxic/corrosive runoff and verify product controls with SDS and ERG 153.
Firefighter training notes: Training for UN 2490 should emphasize toxic/corrosive exposure routes, skin absorption, SCBA use, decontamination, runoff containment and SDS verification. Use ERG 153, SDS and local SOP.
Regulatory context: Dichloroisopropyl ether is regulated as a hazardous material for transport and emergency response. Storage, exposure, spill reporting, waste and fire-code duties depend on quantity, concentration and jurisdiction; verify shipping papers, SDS and local authority requirements.
Storage & handling: Dichloroisopropyl ether should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 2490 Quick Details
Common Hazards of UN 2490
- TOXIC chlorinated ether liquid; inhalation, ingestion or skin contact may cause severe injury.
- Combustible material: may burn but does not ignite readily.
- When heated, vapors may form explosive mixtures and collect in low or confined areas.
- Liquid is denser than water and may sink, spreading contamination below the surface.
- Fire may produce hydrogen chloride, phosgene-type gases and other toxic/corrosive smoke.
- Runoff may carry persistent toxic chlorinated contamination.
- Avoid all skin contact and contaminated clothing exposure.
Chemical Identity & Physical Properties
Colorless to pale yellow liquid with a strong, fruity or chloroform-like odor. Denser than water and may sink.
| Also known as | Bis(2-chloroisopropyl) ether2,2'-Dichlorodiisopropyl etherBis(2-chloro-1-methylethyl) etherDCIPDichloroisopropyl ether |
| CAS Number | 108-60-1 |
| Appearance | Colorless to pale yellow liquid with a strong, fruity or chloroform-like odor. Denser than water and may sink. |
| Flash Point | 85C (185F) |
| Boiling Point | 187C (369F) |
| Vapor Density | 6.0 (heavier than air) |
| Water Reactivity | No significant reaction with water; slightly soluble |
Fireground Response Guidance — UN 2490
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for vapor, dust, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing.
Isolation & Evacuation
First Actions for a UN 2490 Incident
- Call 911 and the emergency response number on the shipping paper, if available.
- Keep unauthorized personnel away and establish incident command.
- Stay upwind, uphill and upstream.
- Avoid breathing vapor, dust, mist, smoke or fumes and avoid skin or eye contact.
- Do not touch damaged containers or spilled material without proper training and PPE.
- Prevent contaminated dust, liquid, runoff and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 153, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 2490 — Dichloroisopropyl etherUse 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.