☣️ UN 1866 • CLASS 3
UN 1866 — Resin solution
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 1866 Quick Details
UN 1866
Product name: Resin solution
DOT Class: 3
Placard type: Flammable
ERG Guide: 128 (check current ERG)
Initial isolation: ERG 128: small spill isolate 50m, large spill isolate 150m; evacuate 800m downwind if tank/rail car involved in fire
Common Hazards of UN 1866
- 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 | Resin solutionDissolved resinResin in solventVarnish solutionLacquer resin solution |
| Appearance | Clear to amber liquid with a characteristic solvent odor. Viscosity varies depending on resin type and solvent concentration. |
| Flash Point | Varies by solvent, typically -18C to 23C (0F to 73F) |
| Boiling Point | Varies by solvent, typically 56C to 138C (133F to 280F) |
| Vapor Density | Heavier than air, typically 2-4 (depends on solvent) |
| Water Reactivity | No significant reaction with water, but immiscible and floats |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1866
Extinguishing Media
Alcohol-resistant AFFF foam, dry chemical, CO2
PPE Requirements
⚠️ Level B minimum; SCBA required in confined spaces or fire; chemical-resistant gloves and splash protection
Isolation & Evacuation
ERG 128: small spill isolate 50m, large spill isolate 150m; evacuate 800m downwind if tank/rail car involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 128).
First Actions for a UN 1866 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 1866 — Resin solutionHAZMAT RADIO NOTE — UN 1866
Product: Resin solution
Class 3 / Flammable / ERG 128
PPE: Level B minimum; SCBA required in confined spaces or fire; chemical-resistant gloves and splash protection
ISOLATION: ERG 128: small spill isolate 50m, large spill isolate 150m; evacuate 800m downwind if tank/rail car involved in 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 1866 — Resin solution
Class: 3 | Placard: Flammable | ERG Guide: 128
Appearance: Clear to amber liquid with a characteristic solvent odor. Viscosity varies depending on resin type and solvent concentration.
Water Reactivity: No significant reaction with water, but immiscible and floats
Extinguishing: Alcohol-resistant AFFF foam, dry chemical, CO2
PPE: Level B minimum; SCBA required in confined spaces or fire; chemical-resistant gloves and splash protection
Isolation: ERG 128: small spill isolate 50m, large spill isolate 150m; evacuate 800m downwind if tank/rail car involved in 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/1866 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1866 Resin solution Cls3 ERG128 | ERG 128: small spill isolate 50m, large spill isolate 150m; evacuate 800m downwi | allfirefighter.com/hazmat/un/1866SMS / 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/1866
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Frequently Asked Questions about UN 1866
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; SCBA required in confined spaces or fire; chemical-resistant gloves and splash protection
Water reactivity: No significant reaction with water, but immiscible and floats. Recommended extinguishing: Alcohol-resistant AFFF foam, dry chemical, CO2.
ERG Guide 128 recommendation: ERG 128: small spill isolate 50m, large spill isolate 150m; evacuate 800m downwind if tank/rail car involved in 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.