UN 2750 — 1,3-Dichloropropanol-2
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2750 is 1,3-Dichloropropanol-2, a toxic chlorinated alcohol assigned to ERG Guide 153. Skin exposure and chlorinated fire products require control.
Hazard overview: TOXIC chlorinated alcohol liquid; inhalation, ingestion or skin absorption may cause severe injury. Combustible liquid; heated vapors may form ignitable mixtures with air. Vapors are heavier than air and may collect in low or confined areas.
Response guidance: For UN 2750, isolate the area, avoid skin contact and use SCBA where dust, vapor, mist or fire is present. Prevent contaminated runoff and verify exact formulation with SDS and ERG 153.
Firefighter training notes: Training for UN 2750 should emphasize vapor travel, toxic exposure routes, SCBA use, fire behavior, decontamination, runoff containment and SDS verification. Use ERG 153, SDS and local SOP.
Regulatory context: 1,3-Dichloropropanol-2 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: 1,3-Dichloropropanol-2 should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 2750 Quick Details
Common Hazards of UN 2750
- TOXIC chlorinated alcohol liquid; inhalation, ingestion or skin absorption may cause severe injury.
- Combustible liquid; heated vapors may form ignitable mixtures with air.
- Vapors are heavier than air and may collect in low or confined areas.
- Skin contact and contaminated clothing can extend exposure.
- Fire may produce hydrogen chloride, carbon monoxide and irritating/toxic smoke.
- Runoff may carry toxic chlorinated contamination.
- Containers may rupture or fail when heated.
Chemical Identity & Physical Properties
Colorless to pale yellow liquid with a chloroform-like odor. Denser than water and moderately viscous at room temperature.
| Also known as | 1,3-Dichloro-2-propanolDCPGlycerol dichlorohydrin2,3-Dichloro-1-propanolDichlorohydrin |
| CAS Number | 96-23-1 |
| Appearance | Colorless to pale yellow liquid with a chloroform-like odor. Denser than water and moderately viscous at room temperature. |
| Flash Point | 74°C (165°F) |
| Boiling Point | 174°C (345°F) |
| Vapor Density | 4.5 (heavier than air) |
| Water Reactivity | No significant reaction; slightly soluble in water |
Fireground Response Guidance — UN 2750
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 2750 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, 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 153, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 2750 — 1,3-Dichloropropanol-2Use 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.