☣️ 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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⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ 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.
Hydrocarbons, liquid, n.o.s. is a Class 3 flammable liquid entry for petroleum or hydrocarbon mixtures whose exact composition must be confirmed by SDS or shipping papers.
Hazard overview: Hydrocarbon vapors can form explosive mixtures with air, travel to ignition sources and flash back. Vapors are usually heavier than air and collect in low or confined areas.
Response guidance: Stop ignition sources, isolate the area and use foam, dry chemical, CO2 or water fog for cooling. Prevent entry into sewers because runoff may create fire or explosion hazards.
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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
Clear to amber liquid with a petroleum or gasoline-like odor. Physical properties vary widely depending on specific hydrocarbon composition.
| 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
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 contact the emergency response telephone number shown on shipping papers, if available.
- 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 contact the emergency response telephone number shown on shipping papers, if available.
• 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/hydrocarbons-liquid-n-o-un-3295 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3295 Hydrocarbons, liquid, n.o.s. Cls3 ERG128 | allfirefighter.com/hazmat/un/hydrocarbons-liquid-n-o-un-3295SMS / 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/hydrocarbons-liquid-n-o-un-3295
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Frequently Asked Questions about UN 3295
UN 3295 is Hydrocarbons, liquid, n.o.s., assigned to ERG Guide 128 and placarded as Flammable.
Yes. It is a Class 3 flammable hydrocarbon liquid whose vapors can ignite, flash back and collect in low areas.
Use caution. Insoluble in water, floats on surface. No significant reaction with water
Alcohol-resistant AFFF foam preferred, protein foam, CO2, dry chemical, water fog for cooling.
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.