☣️ UN 1282 • CLASS 3
UN 1282 — Pyridine
Placard: Flammable. ERG Guide 129. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
Pyridine is a highly volatile liquid with a sharp, penetrating, fish-like or putrid odor. It is used in various industrial applications and can be hazardous if not handled properly.
Hazard overview: Pyridine is highly flammable and can easily ignite at room temperature. Vapors may form explosive mixtures with air.
Response guidance: In case of fire, use alcohol-resistant foam (AR-AFFF), CO2, dry chemical, or water spray for cooling. Evacuate the area and call the fire department.
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UN 1282 Quick Details
UN 1282
Product name: Pyridine
DOT Class: 3
Placard type: Flammable
ERG Guide: 129 (check current ERG)
Initial isolation: ERG 129: Small spill isolate 30m all directions; large spill isolate 100m, evacuate 800m downwind if tank/rail car involved in fire
Common Hazards of UN 1282
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
- Vapors may travel to source of ignition and flash back.
- Most vapors are heavier than air. They will spread along the ground and collect in low or confined areas
- Vapor explosion hazard indoors, outdoors or in sewers.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Runoff to sewer may create fire or explosion hazard.
- Containers may explode when heated.
Chemical Identity & Physical Properties
Pyridine is a colorless to pale yellow liquid with a sharp, penetrating, fish-like or putrid odor. Miscible with water and most organic solvents.
| Also known as | AzineAzabenzenePyridin |
| CAS Number | 110-86-1 |
| Appearance | Colorless to pale yellow liquid with a sharp, penetrating, fish-like or putrid odor. Miscible with water and most organic solvents. |
| Flash Point | 20°C (68°F) |
| Boiling Point | 115°C (239°F) |
| Vapor Density | 2.73 (heavier than air) |
| Water Reactivity | Miscible with water; no violent reaction but may generate heat |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1282
Extinguishing Media
Alcohol-resistant foam (AR-AFFF), CO2, dry chemical, water spray
PPE Requirements
⚠️ Level B minimum with SCBA and chemical-resistant suit; Level A if concentration unknown or confined space entry
Wear Level B minimum personal protective equipment (PPE) with SCBA and chemical-resistant suit; Level A if concentration unknown or confined space entry.
Isolation & Evacuation
ERG 129: Small spill isolate 30m all directions; large spill isolate 100m, evacuate 800m downwind if tank/rail car involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 129).
First Actions for a UN 1282 Incident
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 50 meters (150 feet) in all directions.
- Consider initial downwind evacuation for at least 300 meters (1000 feet).
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📋 Copy & Share Field Card
UN 1282 — PyridineHAZMAT RADIO NOTE — UN 1282
Product: Pyridine
Class 3 / Flammable / ERG 129
PPE: Level B minimum with SCBA and chemical-resistant suit; Level A if concentration unknown or confined space entry
ISOLATION: ERG 129: Small spill isolate 30m all directions; large spill isolate 100m, evacuate 800m downwind if tank/rail car involved in fire
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 1282 — Pyridine
Class: 3 | Placard: Flammable | ERG Guide: 129
Appearance: Colorless to pale yellow liquid with a sharp, penetrating, fish-like or putrid odor. Miscible with water and most organic solvents.
Water Reactivity: Miscible with water; no violent reaction but may generate heat
Extinguishing: Alcohol-resistant foam (AR-AFFF), CO2, dry chemical, water spray
PPE: Level B minimum with SCBA and chemical-resistant suit; Level A if concentration unknown or confined space entry
Isolation: ERG 129: Small spill isolate 30m all directions; large spill isolate 100m, evacuate 800m downwind if tank/rail car involved in fire
— Key Hazards —
• HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
• Vapors may form explosive mixtures with air.
• Vapors may travel to source of ignition and flash back.
— First Actions —
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
• Isolate spill or leak area for at least 50 meters (150 feet) in all directions.
SOURCE: allfirefighter.com/hazmat/un/pyridine-un-1282 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN1282 Pyridine Cls3 ERG129 | ERG 129: Small spill isolate 30m all directions; large spill isolate 100m, evacu | allfirefighter.com/hazmat/un/pyridine-un-1282SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/pyridine-un-1282
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Frequently Asked Questions about UN 1282
Yes, Pyridine is highly flammable and can easily ignite at room temperature.
Pyridine is highly flammable and can form explosive mixtures with air.
Isolate the spill area and evacuate the surrounding area in case of fire.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles.
This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.