☣️ UN 3295 • CLASS 3
UN 3295 — Hydrocarbons, liquid, n.o.s.
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 3295 Quick Details
UN 3295
Product name: Hydrocarbons, liquid, n.o.s.
DOT Class: 3
Placard type: Flammable
ERG Guide: 128 (check current ERG)
Initial isolation: ERG 128: isolate spill 50m all directions; for large spills isolate 800m downwind; evacuate immediate area if fire
Common Hazards of UN 3295
- 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 | Liquid hydrocarbonsPetroleum hydrocarbonsHydrocarbon mixtureFlammable hydrocarbon liquidAliphatic hydrocarbons |
| Appearance | Clear to amber liquid with a petroleum or gasoline-like odor. Physical properties vary widely depending on specific hydrocarbon composition. |
| Flash Point | Varies widely, typically -18C to 23C (0F to 73F) depending on composition |
| Boiling Point | Varies widely, typically 30C to 200C (86F to 392F) depending on composition |
| Vapor Density | Heavier than air (typically 2-4), vapors accumulate in low areas |
| Water Reactivity | Insoluble in water, floats on surface. No significant reaction with water. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3295
Extinguishing Media
Alcohol-resistant AFFF foam preferred, protein foam, CO2, dry chemical, water fog for cooling
PPE Requirements
⚠️ Level B minimum for vapor exposures; SCBA required in enclosed spaces or high concentrations; chemical-resistant gloves and clothing
Isolation & Evacuation
ERG 128: isolate spill 50m all directions; for large spills isolate 800m downwind; evacuate immediate area if fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 128).
First Actions for a UN 3295 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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UN 3295 — Hydrocarbons, liquid, n.o.s.HAZMAT RADIO NOTE — UN 3295
Product: Hydrocarbons, liquid, n.o.s.
Class 3 / Flammable / ERG 128
PPE: Level B minimum for vapor exposures; SCBA required in enclosed spaces or high concentrations; chemical-resistant gloves and clothing
ISOLATION: ERG 128: isolate spill 50m all directions; for large spills isolate 800m downwind; evacuate immediate area 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 3295 — Hydrocarbons, liquid, n.o.s.
Class: 3 | Placard: Flammable | ERG Guide: 128
Appearance: Clear to amber liquid with a petroleum or gasoline-like odor. Physical properties vary widely depending on specific hydrocarbon composition.
Water Reactivity: Insoluble in water, floats on surface. No significant reaction with water.
Extinguishing: Alcohol-resistant AFFF foam preferred, protein foam, CO2, dry chemical, water fog for cooling
PPE: Level B minimum for vapor exposures; SCBA required in enclosed spaces or high concentrations; chemical-resistant gloves and clothing
Isolation: ERG 128: isolate spill 50m all directions; for large spills isolate 800m downwind; evacuate immediate area 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/3295 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3295 Hydrocarbons, liquid, n.o.s. Cls3 ERG128 | allfirefighter.com/hazmat/un/3295SMS / 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/3295
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Frequently Asked Questions about UN 3295
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 vapor exposures; SCBA required in enclosed spaces or high concentrations; chemical-resistant gloves and clothing
Water reactivity: Insoluble in water, floats on surface. No significant reaction with water.. Recommended extinguishing: Alcohol-resistant AFFF foam preferred, protein foam, CO2, dry chemical, water fog for cooling.
ERG Guide 128 recommendation: ERG 128: isolate spill 50m all directions; for large spills isolate 800m downwind; evacuate immediate area 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.