☣️ UN 3018 • CLASS 6
UN 3018 — Organophosphorus pesticide, liquid, poisonous
Placard: Toxic. ERG Guide 152. 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 3018 Quick Details
UN 3018
Product name: Organophosphorus pesticide, liquid, poisonous
DOT Class: 6
Placard type: Toxic
ERG Guide: 152 (check current ERG)
Initial isolation: ERG 152: isolate spill 25-50m all directions; isolate 800m downwind for large spills; evacuate 800m in all directions if tank/rail car involved in fire
Common Hazards of UN 3018
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- Contact with molten substance may cause severe burns to skin and eyes.
- Avoid any skin contact.
- Fire may produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental
- Combustible material: may burn but does not ignite readily.
- Containers may explode when heated.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
Chemical Identity & Physical Properties
| Also known as | organophosphate pesticide liquidOP pesticide liquidphosphorus ester pesticideanticholinesterase pesticide liquid |
| Appearance | Clear to amber or brown liquid with mild to pungent odor depending on formulation. May be oily or water-based solution. |
| Flash Point | Varies by formulation, typically 25-93C (77-200F) for petroleum-based carriers |
| Boiling Point | Varies widely by formulation and carrier solvent, typically 100-250C (212-482F) |
| Vapor Density | Greater than 1 (heavier than air) |
| Water Reactivity | Generally no violent reaction with water, though some formulations may hydrolyze slowly |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3018
Extinguishing Media
Alcohol-resistant foam, dry chemical, CO2; avoid high-pressure water streams that spread contamination
PPE Requirements
⚠️ Level A required for unknown concentrations or spills; Level B minimum with full-face SCBA and chemical-resistant suit; avoid all skin contact due to dermal absorption hazard
Isolation & Evacuation
ERG 152: isolate spill 25-50m all directions; isolate 800m downwind for large spills; evacuate 800m in all directions if tank/rail car involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 152).
First Actions for a UN 3018 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.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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📋 Copy & Share Field Card
UN 3018 — Organophosphorus pesticide, liquid, poisHAZMAT RADIO NOTE — UN 3018
Product: Organophosphorus pesticide, liquid, poisonous
Class 6 / Toxic / ERG 152
PPE: Level A required for unknown concentrations or spills; Level B minimum with full-face SCBA and chemical-resistant suit; avoid all skin contact due to dermal absorption hazard
ISOLATION: ERG 152: isolate spill 25-50m all directions; isolate 800m downwind for large spills; evacuate 800m in all directions 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 3018 — Organophosphorus pesticide, liquid, poisonous
Class: 6 | Placard: Toxic | ERG Guide: 152
Appearance: Clear to amber or brown liquid with mild to pungent odor depending on formulation. May be oily or water-based solution.
Water Reactivity: Generally no violent reaction with water, though some formulations may hydrolyze slowly
Extinguishing: Alcohol-resistant foam, dry chemical, CO2; avoid high-pressure water streams that spread contamination
PPE: Level A required for unknown concentrations or spills; Level B minimum with full-face SCBA and chemical-resistant suit; avoid all skin contact due to dermal absorption hazard
Isolation: ERG 152: isolate spill 25-50m all directions; isolate 800m downwind for large spills; evacuate 800m in all directions if tank/rail car involved in fire
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Contact with molten substance may cause severe burns to skin and eyes.
• Avoid any skin contact.
— 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.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/3018 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3018 Organophosphorus pesticide, liquid, poisonous Cls6 ERG152 | allfirefighter.com/hazmat/un/3018SMS / 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/3018
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Frequently Asked Questions about UN 3018
Highly toxic, may be fatal if inhaled, ingested or absorbed through skin. Contact with molten substance may cause severe burns to skin and eyes. Avoid any skin contact. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause environmental Combustible material: may burn but does not ignite readily. Containers may explode when heated. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
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 A required for unknown concentrations or spills; Level B minimum with full-face SCBA and chemical-resistant suit; avoid all skin contact due to dermal absorption hazard
Water reactivity: Generally no violent reaction with water, though some formulations may hydrolyze slowly. Recommended extinguishing: Alcohol-resistant foam, dry chemical, CO2; avoid high-pressure water streams that spread contamination.
ERG Guide 152 recommendation: ERG 152: isolate spill 25-50m all directions; isolate 800m downwind for large spills; evacuate 800m in all directions if tank/rail car involved in fire
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 152 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.