UN 2688 — Bromo-chloropropane
Placard: Toxic. ERG Guide 159. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
Bromo-chloropropane is a toxic halogenated liquid. The exact isomer and product data should be checked before entry because hazards can vary by formulation.
Hazard overview: The immediate concern is irritating toxic vapor exposure, especially in confined or low-lying areas. Fire can generate corrosive halogen acid fumes and other toxic products.
Response guidance: Move people out of vapor areas, isolate downwind, and use air monitoring before entry. Use alcohol-resistant foam, dry chemical or CO2 for fire; cool containers with water spray from a distance.
Firefighter training notes: Train crews to treat halogenated solvent releases as toxic vapor incidents and to verify the specific isomer before close approach.
Regulatory context: Confirm UN 2688, ERG 159, SDS and shipping papers because the name may represent an isomer-specific or formulation-specific product.
Storage & handling: Store closed in a cool, ventilated area away from heat, ignition sources, strong oxidizers and incompatible bases.
UN 2688 Quick Details
Common Hazards of UN 2688
- Toxic liquid; vapors can strongly irritate eyes, nose, throat and lungs.
- Exposure in enclosed or poorly ventilated areas may be harmful at low concentrations.
- Liquid contact can irritate or injure skin and eyes.
- Some product may burn; fire produces corrosive and toxic decomposition gases.
- Vapors are heavier than air and may collect in low areas.
- Runoff from fire control may contaminate waterways.
- Exact isomer and formulation should be verified because toxicity and flammability can vary.
Chemical Identity & Physical Properties
Colorless to pale yellow dense liquid with a pungent irritating odor; heavier than water and with heavy vapors.
| Also known as | Bromo-chloropropaneBromo-chloropropaneTrimethylene bromochlorideBCPPropane, bromo-chloro- |
| CAS Number | 109-70-6 |
| Appearance | Colorless to pale yellow liquid with a pungent, irritating odor. Denser than water and will sink. |
| Flash Point | 105°F (41°C) |
| Boiling Point | 143°C (289°F) |
| Vapor Density | 5.4 (much heavier than air) |
| Water Reactivity | No significant reaction with water; slightly soluble |
Fireground Response Guidance — UN 2688
Extinguishing Media
PPE Requirements
Use SCBA and chemical-resistant clothing, gloves and eye protection. Consider higher protection if vapor level, isomer or skin absorption risk is uncertain.
Isolation & Evacuation
First Actions for a UN 2688 Incident
- Call 911 and the emergency response number shown on shipping papers or container documents.
- Keep unauthorized personnel away and establish an initial isolation perimeter.
- Stay upwind, uphill and upstream; avoid low areas where vapors or runoff may collect.
- Avoid breathing vapors, dust, smoke or mist and prevent skin and eye contact.
- Do not touch damaged containers or spilled material without appropriate chemical PPE.
- Ventilate confined spaces only when personnel are trained, monitored and properly equipped.
- Use ERG guidance, SDS, shipping papers and air monitoring before committing crews.
📋 Copy & Share Field Card
UN 2688 — Bromo-chloropropaneUse 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.