UN 2947 — Isopropyl chloroacetate
Placard: Flammable. ERG Guide 127. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2947 is Isopropyl chloroacetate, a flammable chloroacetate ester assigned to ERG Guide 127. Flashback and toxic/corrosive hydrolysis products are key hazards.
Hazard overview: FLAMMABLE chloroacetate ester liquid; vapors may ignite and form explosive mixtures with air. Vapors are heavier than air and may travel to ignition sources and flash back. Hydrolysis can form chloroacetic acid and alcohol, creating toxic/corrosive runoff.
Response guidance: For UN 2947, isolate the area, avoid skin contact and use SCBA where dust, vapor, mist or fire is present. Contain runoff and verify controls with SDS and ERG 127.
Firefighter training notes: Training for UN 2947 should emphasize exposure routes, SCBA use, vapor/dust monitoring, decontamination, runoff containment and SDS verification. Use ERG 127, SDS and local SOP.
Regulatory context: Isopropyl chloroacetate is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, formulation and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Isopropyl chloroacetate should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 2947 Quick Details
Common Hazards of UN 2947
- FLAMMABLE chloroacetate ester liquid; vapors may ignite and form explosive mixtures with air.
- Vapors are heavier than air and may travel to ignition sources and flash back.
- Hydrolysis can form chloroacetic acid and alcohol, creating toxic/corrosive runoff.
- Liquid or vapor may irritate eyes, skin and respiratory tract.
- Fire may produce hydrogen chloride, carbon monoxide and irritating/toxic smoke.
- Runoff to sewers may create fire, explosion and toxic contamination hazards.
- Containers may rupture or explode when heated.
Chemical Identity & Physical Properties
Colorless to pale yellow liquid with a pungent, ester-like odor. Liquid at room temperature with moderate viscosity.
| Also known as | Chloroacetic acid isopropyl esterIsopropyl monochloroacetate2-Propyl chloroacetateIsopropyl α-chloroacetate |
| CAS Number | 105-48-6 |
| Appearance | Colorless to pale yellow liquid with a pungent, ester-like odor. Liquid at room temperature with moderate viscosity. |
| Flash Point | 42°C (108°F) |
| Boiling Point | 148-150°C (298-302°F) |
| Vapor Density | 4.7 (heavier than air) |
| Water Reactivity | Hydrolyzes slowly in water to form chloroacetic acid and isopropanol; no violent reaction but avoid prolonged contact |
Fireground Response Guidance — UN 2947
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 2947 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.
- Eliminate ignition sources if this can be done safely.
- Avoid breathing vapor, dust, gas, 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 liquid, dust, runoff and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 127, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 2947 — Isopropyl chloroacetateUse 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.