☣️ UN 3348 • CLASS 6
UN 3348 — Phenoxyacetic acid derivative pesticide, liquid, poisonous
Placard: Toxic. ERG Guide 153. 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.
Advertisement
UN 3348 Quick Details
UN 3348
Product name: Phenoxyacetic acid derivative pesticide, liquid, poisonous
DOT Class: 6
Placard type: Toxic
ERG Guide: 153 (check current ERG)
Initial isolation: ERG 153: isolate spill area minimum 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
Common Hazards of UN 3348
- TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
- Methyl bromoacetate (UN2643) is an eye irritant/lachrymator (causes flow of tears).
- 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.
- When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
Chemical Identity & Physical Properties
| Also known as | Phenoxy herbicide solution2,4-D liquid formulationMCPA pesticide liquidPhenoxyalkanoic acid pesticide |
| Appearance | Clear to amber-colored liquid with mild aromatic or phenolic odor. May be viscous depending on formulation concentration. Liquid at room temperature. |
| Flash Point | Varies by formulation, typically 60-93C (140-200F) for common solvent-based products |
| Boiling Point | Varies by carrier solvent, typically 100-200C (212-392F) depending on formulation |
| Vapor Density | Greater than 1 (heavier than air) for most organic solvent carriers |
| Water Reactivity | No significant reaction with water, though may slowly hydrolyze in alkaline conditions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3348
Extinguishing Media
Alcohol-resistant foam, dry chemical, CO2 suitable; water spray for cooling containers
PPE Requirements
⚠️ Level B minimum; SCBA required in confined spaces or fire; chemical-resistant suit, gloves, and boots mandatory due to skin absorption hazard
Isolation & Evacuation
ERG 153: isolate spill area minimum 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 153).
First Actions for a UN 3348 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 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
Advertisement
📋 Copy & Share Field Card
UN 3348 — Phenoxyacetic acid derivative pesticide,HAZMAT RADIO NOTE — UN 3348
Product: Phenoxyacetic acid derivative pesticide, liquid, poisonous
Class 6 / Toxic / ERG 153
PPE: Level B minimum; SCBA required in confined spaces or fire; chemical-resistant suit, gloves, and boots mandatory due to skin absorption hazard
ISOLATION: ERG 153: isolate spill area minimum 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
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 3348 — Phenoxyacetic acid derivative pesticide, liquid, poisonous
Class: 6 | Placard: Toxic | ERG Guide: 153
Appearance: Clear to amber-colored liquid with mild aromatic or phenolic odor. May be viscous depending on formulation concentration. Liquid at room temperature.
Water Reactivity: No significant reaction with water, though may slowly hydrolyze in alkaline conditions
Extinguishing: Alcohol-resistant foam, dry chemical, CO2 suitable; water spray for cooling containers
PPE: Level B minimum; SCBA required in confined spaces or fire; chemical-resistant suit, gloves, and boots mandatory due to skin absorption hazard
Isolation: ERG 153: isolate spill area minimum 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
— Key Hazards —
• TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury
• Methyl bromoacetate (UN2643) is an eye irritant/lachrymator (causes flow of tears).
• Contact with molten substance may cause severe burns to skin and eyes.
— 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/3348 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3348 Phenoxyacetic acid derivative pesticide, liquid, poisonous Cls6 ERG153 | allfirefighter.com/hazmat/un/3348SMS / 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/3348
Advertisement
Frequently Asked Questions about UN 3348
TOXIC and/or CORROSIVE; inhalation, ingestion or skin contact with material may cause severe injury Methyl bromoacetate (UN2643) is an eye irritant/lachrymator (causes flow of tears). 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. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion
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 suit, gloves, and boots mandatory due to skin absorption hazard
Water reactivity: No significant reaction with water, though may slowly hydrolyze in alkaline conditions. Recommended extinguishing: Alcohol-resistant foam, dry chemical, CO2 suitable; water spray for cooling containers.
ERG Guide 153 recommendation: ERG 153: isolate spill area minimum 25m all directions; if tank/rail car involved in fire, isolate 800m all directions and consider evacuation
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 153 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.