☣️ UN 2780 • CLASS 3
UN 2780 — Substituted nitrophenol pesticide, liquid, flammable, poisonous
Placard: Flammable. ERG Guide 131. 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 2780 Quick Details
UN 2780
Product name: Substituted nitrophenol pesticide, liquid, flammable, poisonous
DOT Class: 3
Placard type: Flammable
ERG Guide: 131 (check current ERG)
Initial isolation: ERG 131: Small spill isolate 50m; Large spill isolate 150m initial; Evacuate 800m downwind if tank/railcar involved in fire
Common Hazards of UN 2780
- TOXIC; may be fatal if inhaled, ingested or absorbed through skin.
- Inhalation or contact with some of these materials will irritate or burn skin and eyes.
- Methyl chloroacetate (UN2295) is an eye irritant/lachrymator (causes flow of tears).
- Fire will produce irritating, corrosive and/or toxic gases.
- Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas.
- Runoff from fire control or dilution water may cause environmental contamination.
- HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
- Vapors may form explosive mixtures with air.
Chemical Identity & Physical Properties
| Also known as | nitrophenol pesticidedinitrophenol pesticideDNOC pesticidenitrated phenolic pesticide |
| Appearance | Flammable liquid varying in color from yellow to brown depending on specific compound. Typically has a phenolic or chemical odor. Liquid at room temperature. |
| Flash Point | 23-61C (73-142F) depending on formulation |
| Boiling Point | Varies by formulation, typically 100-200C (212-392F) |
| Vapor Density | Heavier than air (>1) |
| Water Reactivity | No significant reaction with water, but may contaminate water sources |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2780
Extinguishing Media
Alcohol-resistant foam (AR-AFFF), CO2, dry chemical; avoid straight water streams
PPE Requirements
⚠️ Level A for spills or unknown concentrations; Level B minimum with SCBA; chemical-resistant suit, gloves, boots required; avoid all skin contact
Isolation & Evacuation
ERG 131: Small spill isolate 50m; Large spill isolate 150m initial; Evacuate 800m downwind if tank/railcar involved in fire
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 131).
First Actions for a UN 2780 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.
- 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 2780 — Substituted nitrophenol pesticide, liquiHAZMAT RADIO NOTE — UN 2780
Product: Substituted nitrophenol pesticide, liquid, flammable, poisonous
Class 3 / Flammable / ERG 131
PPE: Level A for spills or unknown concentrations; Level B minimum with SCBA; chemical-resistant suit, gloves, boots required; avoid all skin contact
ISOLATION: ERG 131: Small spill isolate 50m; Large spill isolate 150m initial; Evacuate 800m downwind if tank/railcar 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 2780 — Substituted nitrophenol pesticide, liquid, flammable, poisonous
Class: 3 | Placard: Flammable | ERG Guide: 131
Appearance: Flammable liquid varying in color from yellow to brown depending on specific compound. Typically has a phenolic or chemical odor. Liquid at room temperature.
Water Reactivity: No significant reaction with water, but may contaminate water sources
Extinguishing: Alcohol-resistant foam (AR-AFFF), CO2, dry chemical; avoid straight water streams
PPE: Level A for spills or unknown concentrations; Level B minimum with SCBA; chemical-resistant suit, gloves, boots required; avoid all skin contact
Isolation: ERG 131: Small spill isolate 50m; Large spill isolate 150m initial; Evacuate 800m downwind if tank/railcar involved in fire
— Key Hazards —
• TOXIC; may be fatal if inhaled, ingested or absorbed through skin.
• Inhalation or contact with some of these materials will irritate or burn skin and eyes.
• Methyl chloroacetate (UN2295) is an eye irritant/lachrymator (causes flow of tears).
— 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/2780 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2780 Substituted nitrophenol pesticide, liquid, flammable, poisonous Cls3 ERG131 | allfirefighter.com/hazmat/un/2780SMS / 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/2780
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Frequently Asked Questions about UN 2780
TOXIC; may be fatal if inhaled, ingested or absorbed through skin. Inhalation or contact with some of these materials will irritate or burn skin and eyes. Methyl chloroacetate (UN2295) is an eye irritant/lachrymator (causes flow of tears). Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or asphyxiation, especially when in closed or confined areas. Runoff from fire control or dilution water may cause environmental contamination. HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air.
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 for spills or unknown concentrations; Level B minimum with SCBA; chemical-resistant suit, gloves, boots required; avoid all skin contact
Water reactivity: No significant reaction with water, but may contaminate water sources. Recommended extinguishing: Alcohol-resistant foam (AR-AFFF), CO2, dry chemical; avoid straight water streams.
ERG Guide 131 recommendation: ERG 131: Small spill isolate 50m; Large spill isolate 150m initial; Evacuate 800m downwind if tank/railcar involved in fire
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 131 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.