☣️ UN 2993 • CLASS 6
UN 2993 — Arsenical pesticide, liquid, poisonous, flammable
Placard: Toxic. 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 2993 Quick Details
UN 2993
Product name: Arsenical pesticide, liquid, poisonous, flammable
DOT Class: 6
Placard type: Toxic
ERG Guide: 131 (check current ERG)
Initial isolation: ERG 131: Initial isolation 50m in all directions; spill: day 100m downwind, night 200m downwind; fire: evacuate 800m radius
Common Hazards of UN 2993
- 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 | Arsenical pesticide solutionArsenic-based pesticide liquidFlammable arsenic pesticideToxic arsenical formulation |
| Appearance | Liquid pesticide formulation containing arsenic compounds, typically amber to brown in color with a characteristic chemical or solvent-like odor. Flammable liquid at room temperature. |
| Flash Point | Varies by formulation, typically 23-60°C (73-140°F) - flammable liquid |
| Boiling Point | Varies by formulation and solvent carrier, typically 80-150°C (176-302°F) |
| Vapor Density | Greater than 1 (heavier than air) - vapors will accumulate in low areas |
| Water Reactivity | No violent reaction with water, but may hydrolyze releasing toxic arsenic compounds; avoid dilution without proper containment |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 2993
Extinguishing Media
Alcohol-resistant foam (AR-AFFF), CO2, dry chemical; water spray for cooling only - do not apply directly to liquid
PPE Requirements
⚠️ Level A required for unknown concentrations or spills; Level B minimum with SCBA and chemical-resistant suit; arsenic is highly toxic through all exposure routes
Isolation & Evacuation
ERG 131: Initial isolation 50m in all directions; spill: day 100m downwind, night 200m downwind; fire: evacuate 800m radius
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 131).
First Actions for a UN 2993 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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UN 2993 — Arsenical pesticide, liquid, poisonous,HAZMAT RADIO NOTE — UN 2993
Product: Arsenical pesticide, liquid, poisonous, flammable
Class 6 / Toxic / ERG 131
PPE: Level A required for unknown concentrations or spills; Level B minimum with SCBA and chemical-resistant suit; arsenic is highly toxic through all exposure routes
ISOLATION: ERG 131: Initial isolation 50m in all directions; spill: day 100m downwind, night 200m downwind; fire: evacuate 800m radius
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 2993 — Arsenical pesticide, liquid, poisonous, flammable
Class: 6 | Placard: Toxic | ERG Guide: 131
Appearance: Liquid pesticide formulation containing arsenic compounds, typically amber to brown in color with a characteristic chemical or solvent-like odor. Flammable liquid at room temperature.
Water Reactivity: No violent reaction with water, but may hydrolyze releasing toxic arsenic compounds; avoid dilution without proper containment
Extinguishing: Alcohol-resistant foam (AR-AFFF), CO2, dry chemical; water spray for cooling only - do not apply directly to liquid
PPE: Level A required for unknown concentrations or spills; Level B minimum with SCBA and chemical-resistant suit; arsenic is highly toxic through all exposure routes
Isolation: ERG 131: Initial isolation 50m in all directions; spill: day 100m downwind, night 200m downwind; fire: evacuate 800m radius
— 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/2993 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN2993 Arsenical pesticide, liquid, poisonous, flammable Cls6 ERG131 | allfirefighter.com/hazmat/un/2993SMS / 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/2993
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Frequently Asked Questions about UN 2993
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 required for unknown concentrations or spills; Level B minimum with SCBA and chemical-resistant suit; arsenic is highly toxic through all exposure routes
Water reactivity: No violent reaction with water, but may hydrolyze releasing toxic arsenic compounds; avoid dilution without proper containment. Recommended extinguishing: Alcohol-resistant foam (AR-AFFF), CO2, dry chemical; water spray for cooling only - do not apply directly to liquid.
ERG Guide 131 recommendation: ERG 131: Initial isolation 50m in all directions; spill: day 100m downwind, night 200m downwind; fire: evacuate 800m radius
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.