UN 2047 — Dichloropropenes
Placard: Flammable. ERG Guide 129. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2047 is Dichloropropenes, a flammable chlorinated liquid assigned to ERG Guide 129. Vapor fire, toxic exposure and chlorinated decomposition products are key hazards.
Hazard overview: FLAMMABLE and toxic chlorinated liquid; vapors may ignite and form explosive mixtures with air. Vapors are heavier than air and may travel to ignition sources and flash back. Inhalation or skin contact may cause toxic effects; exact isomer mixture should be verified by SDS.
Response guidance: For a UN 2047 incident, verify the product with shipping papers, container markings, SDS and ERG Guide 129. Establish incident command, isolate the area, stay upwind, control ignition or incompatibility hazards, prevent runoff or vapor spread and base entry/fire-control actions on monitoring and local SOP.
Firefighter training notes: Training for UN 2047 should emphasize vapor travel, sewer flashback, foam selection, toxic/corrosive exposure where applicable, decontamination and runoff control. Use ERG 129, SDS and local SOP.
Regulatory context: Dichloropropenes 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: Dichloropropenes should be stored in approved flammable-liquid containers with ventilation, bonding/grounding where required, spill containment and separation from heat, ignition sources, oxidizers and incompatible materials.
UN 2047 Quick Details
Common Hazards of UN 2047
- FLAMMABLE and toxic chlorinated liquid; vapors may ignite and form explosive mixtures with air.
- Vapors are heavier than air and may travel to ignition sources and flash back.
- Inhalation or skin contact may cause toxic effects; exact isomer mixture should be verified by SDS.
- Fire may produce hydrogen chloride, phosgene-type gases and other toxic/corrosive decomposition products.
- Runoff to sewers may create fire, explosion and toxic contamination hazards.
- Containers may rupture or explode when heated.
- Avoid vapor accumulation in drains, basements and confined spaces.
Chemical Identity & Physical Properties
Colorless to amber liquid with a sweet, irritating chloroform-like odor. Exists as cis and trans isomers or mixtures thereof.
| Also known as | 1,3-DichloropropeneTeloneD-D mixtureDichloropropyleneVidden D |
| CAS Number | 26952-23-8 |
| Appearance | Colorless to amber liquid with a sweet, irritating chloroform-like odor. Exists as cis and trans isomers or mixtures thereof. |
| Flash Point | 35°C (95°F) |
| Boiling Point | 104-112°C (219-234°F) |
| Vapor Density | 3.8 (heavier than air) |
| Water Reactivity | No significant reaction with water; slightly soluble |
Fireground Response Guidance — UN 2047
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for vapor, fire or confined-space exposure. Wear chemical-resistant gloves, eye/face protection, flame-resistant protection as appropriate and PPE selected from SDS.
Isolation & Evacuation
First Actions for a UN 2047 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, gas, dust, mist, smoke or fumes and avoid skin or eye contact.
- Eliminate ignition sources if safe and keep vapors and runoff out of drains, sewers, basements and low areas.
- Do not touch damaged containers or spilled/released material unless properly trained and wearing appropriate protective equipment.
- 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 spread, cylinder heating or unknown product identity.
- Use ERG Guide 129, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 2047 — DichloropropenesUse 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.