☣️ UN 1206 • CLASS 3
UN 1206 — Heptanes
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 1206 Quick Details
UN 1206
Product name: Heptanes
DOT Class: 3
Placard type: Flammable
ERG Guide: 128 (check current ERG)
Initial isolation: ERG 128: isolate spill 50m all directions; for large spill isolate 150m, evacuate 800m downwind if fire
Common Hazards of UN 1206
- 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 | n-Heptanenormal heptaneheptyl hydridedipropyl methane |
| CAS Number | 142-82-5 |
| Appearance | Colorless liquid with a gasoline-like or petroleum odor. Volatile and highly flammable at room temperature. |
| Flash Point | -4C (25F) |
| Boiling Point | 98C (209F) |
| Vapor Density | 3.5 (heavier than air) |
| Water Reactivity | No significant reaction; floats on water and is immiscible |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1206
Extinguishing Media
AFFF foam, alcohol-resistant foam, CO2, dry chemical; water spray for cooling only
PPE Requirements
⚠️ Level B minimum for spill response; SCBA and chemical-resistant suit required for fire or confined space entry
Isolation & Evacuation
ERG 128: isolate spill 50m all directions; for large spill isolate 150m, evacuate 800m downwind if fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 128).
First Actions for a UN 1206 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 1206 — HeptanesHAZMAT RADIO NOTE — UN 1206
Product: Heptanes
Class 3 / Flammable / ERG 128
PPE: Level B minimum for spill response; SCBA and chemical-resistant suit required for fire or confined space entry
ISOLATION: ERG 128: isolate spill 50m all directions; for large spill isolate 150m, evacuate 800m downwind if 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 1206 — Heptanes
Class: 3 | Placard: Flammable | ERG Guide: 128
Appearance: Colorless liquid with a gasoline-like or petroleum odor. Volatile and highly flammable at room temperature.
Water Reactivity: No significant reaction; floats on water and is immiscible
Extinguishing: AFFF foam, alcohol-resistant foam, CO2, dry chemical; water spray for cooling only
PPE: Level B minimum for spill response; SCBA and chemical-resistant suit required for fire or confined space entry
Isolation: ERG 128: isolate spill 50m all directions; for large spill isolate 150m, evacuate 800m downwind if 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 —
• 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/1206 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1206 Heptanes Cls3 ERG128 | ERG 128: isolate spill 50m all directions; for large spill isolate 150m, evacuat | allfirefighter.com/hazmat/un/1206SMS / 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/1206
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Frequently Asked Questions about UN 1206
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 for spill response; SCBA and chemical-resistant suit required for fire or confined space entry
Water reactivity: No significant reaction; floats on water and is immiscible. Recommended extinguishing: AFFF foam, alcohol-resistant foam, CO2, dry chemical; water spray for cooling only.
ERG Guide 128 recommendation: ERG 128: isolate spill 50m all directions; for large spill isolate 150m, evacuate 800m downwind if fire
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.