☣️ UN 2319 • CLASS 3
Terpene hydrocarbons, n.o.s.
Placard: Flammable. 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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Quick details
UN 2319
Class: 3
Placard type: Flammable
ERG: Guide 128 (check current ERG)
Isolation: ERG 128: Initial isolation 50m in all directions; for large spills isolate 150m downwind; protective action distance 300m for large fire
Chemical & Response Details
| Also known as | TerpenesTurpentine hydrocarbonsPine oil componentsLimonene mixturesα-Pinene mixtures |
| Appearance | Clear to pale yellow oily liquids with characteristic pine or citrus odor. Lighter than water and insoluble in water. |
| Flash Point | Typically 35-45°C (95-113°F) depending on specific terpene composition |
| Boiling Point | 150-180°C (302-356°F) range, varies by specific hydrocarbon mixture |
| Vapor Density | 4.5-5.0 (significantly heavier than air) |
| Water Reactivity | No significant reaction with water; insoluble and floats on water surface |
| Extinguishing | Alcohol-resistant AFFF foam, CO2, dry chemical powder; water spray for cooling only |
| PPE | ⚠️ Level B minimum recommended; SCBA required in confined spaces or fire conditions; chemical-resistant gloves and suit for spill cleanup |
| Isolation | ERG 128: Initial isolation 50m in all directions; for large spills isolate 150m downwind; protective action distance 300m for large fire |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- 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.
First actions (field-minded)
- 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 2319 — Terpene hydrocarbons, n.o.s. HAZMAT RADIO NOTE — UN 2319
Product: Terpene hydrocarbons, n.o.s.
Class 3 / Flammable / ERG 128
PPE: Level B minimum recommended; SCBA required in confined spaces or fire conditions; chemical-resistant gloves and suit for spill cleanup
ISOLATION: ERG 128: Initial isolation 50m in all directions; for large spills isolate 150m downwind; protective action distance 300m for large 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 2319 — Terpene hydrocarbons, n.o.s.
Class: 3 | Placard: Flammable | ERG Guide: 128
Appearance: Clear to pale yellow oily liquids with characteristic pine or citrus odor. Lighter than water and insoluble in water.
Water Reactivity: No significant reaction with water; insoluble and floats on water surface
Extinguishing: Alcohol-resistant AFFF foam, CO2, dry chemical powder; water spray for cooling only
PPE: Level B minimum recommended; SCBA required in confined spaces or fire conditions; chemical-resistant gloves and suit for spill cleanup
Isolation: ERG 128: Initial isolation 50m in all directions; for large spills isolate 150m downwind; protective action distance 300m for large 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/2319 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2319 Terpene hydrocarbons, n.o.s. Cls3 ERG128 | allfirefighter.com/hazmat/un/2319SMS / 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/2319
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FAQ
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 recommended; SCBA required in confined spaces or fire conditions; chemical-resistant gloves and suit for spill cleanup
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.