UN 2075 — Chloral, anhydrous, stabilized
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2075 is Chloral, anhydrous, stabilized, a toxic corrosive chlorinated liquid assigned to ERG Guide 153. It fumes in moist air and can form hydrochloric acid-containing contamination.
Hazard overview: TOXIC and CORROSIVE chloral liquid; inhalation, ingestion or skin/eye contact may cause severe injury. Fumes in moist air and can form chloral hydrate and hydrochloric acid in contact with water. Vapors are heavier than air and may collect in low or confined areas.
Response guidance: For a UN 2075 incident, verify the product with shipping papers, container markings, SDS and ERG Guide 153. 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 2075 should emphasize exposure routes, air monitoring, PPE selection, fire behavior, decontamination, runoff containment and ERG/SDS verification. Use ERG 153, SDS and local SOP.
Regulatory context: Chloral, anhydrous, stabilized 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: Chloral, anhydrous, stabilized should be stored in tightly closed compatible containers in a secure, ventilated toxic/corrosive area with secondary containment, restricted access and segregation from incompatible chemicals according to SDS.
UN 2075 Quick Details
Common Hazards of UN 2075
- TOXIC and CORROSIVE chloral liquid; inhalation, ingestion or skin/eye contact may cause severe injury.
- Fumes in moist air and can form chloral hydrate and hydrochloric acid in contact with water.
- Vapors are heavier than air and may collect in low or confined areas.
- Combustible behavior is limited, but heating or fire may produce toxic chlorinated and corrosive gases.
- Liquid and vapor can burn eyes, skin and respiratory tissue.
- Runoff may be toxic/corrosive and contaminate drains or soil.
- Containers may rupture or fail when heated.
Chemical Identity & Physical Properties
Colorless to light yellow oily liquid with a pungent, irritating odor. Volatile and corrosive. Fumes in moist air.
| Also known as | TrichloroacetaldehydeTrichloroethanalChloral anhydrous2,2,2-Trichloroacetaldehyde |
| CAS Number | 75-87-6 |
| Appearance | Colorless to light yellow oily liquid with a pungent, irritating odor. Volatile and corrosive. Fumes in moist air. |
| Flash Point | Not applicable (non-flammable) |
| Boiling Point | 97-98C (207-208F) |
| Vapor Density | 5.1 (much heavier than air) |
| Water Reactivity | Reacts slowly with water forming chloral hydrate and hydrochloric acid; avoid prolonged water contact |
Fireground Response Guidance — UN 2075
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA for dust, vapor, mist, fire or confined-space exposure. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing selected from SDS; avoid skin contact.
Isolation & Evacuation
First Actions for a UN 2075 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.
- 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, gas accumulation, cylinder heating or unknown product identity.
- Use ERG Guide 153, shipping papers, SDS, air monitoring and incident command for protective actions.
📋 Copy & Share Field Card
UN 2075 — Chloral, anhydrous, stabilizedUse 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.