UN 2822 — 2-Chloropyridine
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 2822 is 2-Chloropyridine, a toxic chlorinated pyridine assigned to ERG Guide 153. Vapor, skin exposure and HCl/NOx fire products are key hazards.
Hazard overview: TOXIC chlorinated pyridine liquid; inhalation, ingestion or skin contact 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 2822, isolate the area, avoid skin contact and use SCBA where dust, vapor, mist or fire is present. Contain corrosive/toxic runoff and verify controls with SDS and ERG 153.
Firefighter training notes: Training for UN 2822 should emphasize exposure routes, SCBA use, vapor/dust monitoring, fire behavior, decontamination, runoff containment and SDS verification. Use ERG 153, SDS and local SOP.
Regulatory context: 2-Chloropyridine 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: 2-Chloropyridine should be stored in tightly closed compatible containers with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 2822 Quick Details
Common Hazards of UN 2822
- TOXIC chlorinated pyridine liquid; inhalation, ingestion or skin contact 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.
- Liquid and vapor can irritate or burn eyes, skin and respiratory tissue.
- Fire may produce hydrogen chloride, nitrogen oxides and 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 strong, unpleasant, pungent odor. Corrosive and toxic.
| Also known as | 2-chloropyridinealpha-chloropyridineo-chloropyridinepyridine, 2-chloro- |
| CAS Number | 109-09-1 |
| Appearance | Colorless to pale yellow liquid with a strong, unpleasant, pungent odor. Corrosive and toxic. |
| Flash Point | 68°C (154°F) |
| Boiling Point | 170°C (338°F) |
| Vapor Density | 3.9 (heavier than air) |
| Water Reactivity | No significant reaction with water; slightly soluble |
Fireground Response Guidance — UN 2822
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 2822 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.
- 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 2822 — 2-ChloropyridineUse 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.