☣️ UN 1202 • CLASS 3
UN 1202 — Heating oil, light
Placard: Flammable. ERG Guide 128. 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.
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UN 1202 Quick Details
UN 1202
Product name: Heating oil, light
DOT Class: 3
Placard type: Flammable
ERG Guide: 128 (check current ERG)
Initial isolation: ERG 128: Isolate spill 50m all directions. For large fire, isolate 800m all directions and consider evacuation.
Common Hazards of UN 1202
- 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
| Also known as | Diesel fuel No. 1Gas oilLight fuel oilDistillate fuel oilHome heating oil |
| CAS Number | 68476-30-2 |
| Appearance | Clear to amber liquid with a mild petroleum odor. Slightly heavier than water and insoluble in water. |
| Flash Point | 38-52C (100-125F) |
| Boiling Point | 175-290C (347-554F) |
| Vapor Density | 4.5 (heavier than air) |
| Water Reactivity | No significant reaction with water. Floats on water surface. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1202
Extinguishing Media
AFFF, alcohol-resistant foam, dry chemical, CO2, water spray for cooling
PPE Requirements
⚠️ Level B minimum with SCBA for fire or large spills. Level D with nitrile gloves for small spills in well-ventilated areas.
Isolation & Evacuation
ERG 128: Isolate spill 50m all directions. For large fire, isolate 800m all directions and consider evacuation.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 128).
First Actions for a UN 1202 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- 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 1202 — Heating oil, lightHAZMAT RADIO NOTE — UN 1202
Product: Heating oil, light
Class 3 / Flammable / ERG 128
PPE: Level B minimum with SCBA for fire or large spills. Level D with nitrile gloves for small spills in well-ventilated areas.
ISOLATION: ERG 128: Isolate spill 50m all directions. For large fire, isolate 800m all directions and consider evacuation.
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 1202 — Heating oil, light
Class: 3 | Placard: Flammable | ERG Guide: 128
Appearance: Clear to amber liquid with a mild petroleum odor. Slightly heavier than water and insoluble in water.
Water Reactivity: No significant reaction with water. Floats on water surface.
Extinguishing: AFFF, alcohol-resistant foam, dry chemical, CO2, water spray for cooling
PPE: Level B minimum with SCBA for fire or large spills. Level D with nitrile gloves for small spills in well-ventilated areas.
Isolation: ERG 128: Isolate spill 50m all directions. For large fire, isolate 800m all directions and consider evacuation.
— 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 —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Ventilate closed spaces before entering, but only if properly trained and equipped.
SOURCE: allfirefighter.com/hazmat/un/1202 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1202 Heating oil, light Cls3 ERG128 | ERG 128: Isolate spill 50m all directions. For large fire, isolate 800m all dire | allfirefighter.com/hazmat/un/1202SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/1202
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Frequently Asked Questions about UN 1202
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.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum with SCBA for fire or large spills. Level D with nitrile gloves for small spills in well-ventilated areas.
Water reactivity: No significant reaction with water. Floats on water surface.. Recommended extinguishing: AFFF, alcohol-resistant foam, dry chemical, CO2, water spray for cooling.
ERG Guide 128 recommendation: ERG 128: Isolate spill 50m all directions. For large fire, isolate 800m all directions and consider evacuation.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 128 and your department SOP/SOG for incident-specific protective actions.
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.