☣️ UN 3347 • CLASS 6
Phenoxyacetic acid derivative pesticide, liquid, poisonous, flammable
Placard: Toxic. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ 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 3347
Class: 6
Placard type: Toxic
ERG: Guide 131 (check current ERG)
Isolation: ERG 131: Initial isolation 50m all directions; protective action distance 0.3km downwind daytime, 0.8km downwind nighttime for large spills; evacuate spill area immediately due to toxic vapor hazard
Chemical & Response Details
| Also known as | 2,4-D liquid formulationsMCPA liquid formulationsphenoxy herbicide liquidchlorophenoxy acid pesticidehormone-type herbicide liquid |
| Appearance | Liquid formulation typically amber to dark brown in color with a characteristic phenolic or ester odor. May be clear to turbid depending on formulation and concentration. |
| Flash Point | 23-61C (73-142F) depending on solvent carrier and formulation concentration |
| Boiling Point | Varies widely 100-200C (212-392F) depending on solvent system and active ingredient concentration |
| Vapor Density | Greater than 1 (heavier than air) - vapors will accumulate in low-lying areas |
| Water Reactivity | No significant reaction with water, though some formulations may be water-miscible or form emulsions |
| Extinguishing | Alcohol-resistant foam (AR-AFFF), CO2, dry chemical - avoid high-pressure water streams that spread liquid |
| PPE | ⚠️ Level B minimum with SCBA; chemical-resistant suit required - these materials readily absorb through skin and are highly toxic by all routes of exposure |
| Isolation | ERG 131: Initial isolation 50m all directions; protective action distance 0.3km downwind daytime, 0.8km downwind nighttime for large spills; evacuate spill area immediately due to toxic vapor hazard |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Common hazards (high level)
- 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.
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.
- 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 3347 — Phenoxyacetic acid derivative pesticide, HAZMAT RADIO NOTE — UN 3347
Product: Phenoxyacetic acid derivative pesticide, liquid, poisonous, flammable
Class 6 / Toxic / ERG 131
PPE: Level B minimum with SCBA; chemical-resistant suit required - these materials readily absorb through skin and are highly toxic by all routes of exposure
ISOLATION: ERG 131: Initial isolation 50m all directions; protective action distance 0.3km downwind daytime, 0.8km downwind nighttime for large spills; evacuate spill area immediately due to toxic vapor hazard
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 3347 — Phenoxyacetic acid derivative pesticide, liquid, poisonous, flammable
Class: 6 | Placard: Toxic | ERG Guide: 131
Appearance: Liquid formulation typically amber to dark brown in color with a characteristic phenolic or ester odor. May be clear to turbid depending on formulation and concentration.
Water Reactivity: No significant reaction with water, though some formulations may be water-miscible or form emulsions
Extinguishing: Alcohol-resistant foam (AR-AFFF), CO2, dry chemical - avoid high-pressure water streams that spread liquid
PPE: Level B minimum with SCBA; chemical-resistant suit required - these materials readily absorb through skin and are highly toxic by all routes of exposure
Isolation: ERG 131: Initial isolation 50m all directions; protective action distance 0.3km downwind daytime, 0.8km downwind nighttime for large spills; evacuate spill area immediately due to toxic vapor hazard
— 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/3347 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3347 Phenoxyacetic acid derivative pesticide, liquid, poisonous, flammable Cls6 ERG131 | allfirefighter.com/hazmat/un/3347SMS / 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/3347
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FAQ
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 B minimum with SCBA; chemical-resistant suit required - these materials readily absorb through skin and are highly toxic by all routes of exposure
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.