UN 3346 — Phenoxyacetic acid derivative pesticide, liquid, flammable, poisonous
Placard: Flammable. ERG Guide 131. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3346 At a Glance
UN 3346 (Phenoxyacetic acid derivative pesticide, liquid, flammable, poisonous) is listed as DOT Class 3 Flammable and is assigned to ERG Guide 131. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
UN 3346 is Phenoxyacetic acid derivative pesticide, liquid, flammable, poisonous, a toxic flammable phenoxyacetic pesticide liquid assigned to ERG Guide 131. Solvent vapors and toxic runoff are key.
Hazard overview: TOXIC and FLAMMABLE phenoxyacetic acid derivative pesticide liquid; inhalation, ingestion or skin absorption may cause injury. Carrier solvent vapors may ignite and form explosive mixtures with air. Vapors may travel to ignition sources and flash back.
Response guidance: For UN 3346, isolate the area, avoid skin contact and use SCBA for dust/vapor/fire. Contain pesticide runoff and verify active ingredient with SDS and ERG 131.
Firefighter training notes: Training for UN 3346 should emphasize product verification, SCBA use, exposure control, decontamination, runoff containment and SDS/shipping paper review. Use ERG 131, SDS and local SOP.
Regulatory context: Phenoxyacetic acid derivative pesticide, liquid, flammable, poisonous is regulated as a hazardous material for transport and emergency response. Storage, reporting, exposure, waste and incident-notification duties depend on quantity, package type, formulation and jurisdiction; verify shipping papers, SDS and authority guidance.
Storage & handling: Phenoxyacetic acid derivative pesticide, liquid, flammable, poisonous should be stored in tightly closed compatible containers or packages with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 3346 Quick Details
Common Hazards of UN 3346
- TOXIC and FLAMMABLE phenoxyacetic acid derivative pesticide liquid; inhalation, ingestion or skin absorption may cause injury.
- Carrier solvent vapors may ignite and form explosive mixtures with air.
- Vapors may travel to ignition sources and flash back.
- Liquid can contaminate clothing, soil, drains and waterways.
- Fire may produce hydrogen chloride, toxic pesticide smoke and irritating/corrosive gases.
- Runoff may be flammable-contaminated, toxic and environmentally harmful.
- Exact active ingredient, solvent and concentration must be verified from SDS.
Chemical Identity & Physical Properties
Clear to amber-colored liquid with mild aromatic or solvent-like odor. Flammable liquid pesticide formulation typically dissolved in organic solvents.
| Also known as | 2,4-D liquid formulationMCPA liquid pesticidePhenoxy herbicide liquidChlorophenoxy acid pesticide |
| Appearance | Clear to amber-colored liquid with mild aromatic or solvent-like odor. Flammable liquid pesticide formulation typically dissolved in organic solvents. |
| Flash Point | 23-60°C (73-140°F) depending on solvent formulation |
| Boiling Point | Varies by formulation, typically 100-200°C (212-392°F) |
| Vapor Density | Heavier than air (typically 3-5 relative to air) |
| Water Reactivity | No significant reaction with water, though may form emulsions or separate layers |
Fireground Response Guidance — UN 3346
Extinguishing Media
PPE Requirements
Use positive-pressure SCBA where vapor, dust, smoke or fire is present. Wear chemical-resistant gloves, boots, eye/face protection and protective clothing.
Isolation & Evacuation
First Actions for a UN 3346 Incident
- Call 911 and the emergency response number on the shipping paper, if available.
- Keep unauthorized personnel away and establish incident command.
- Stay upwind, uphill and upstream.
- Eliminate ignition sources if this can be done safely.
- Avoid breathing vapor, dust, gas, mist, smoke or aerosols and avoid skin or eye contact.
- Do not touch damaged containers, cylinders, packages or spilled material without proper training and PPE.
- Prevent contaminated liquid, dust, runoff, residue and decontamination waste from spreading.
- Ventilate confined spaces only after monitoring and only if properly trained and equipped.
- Use ERG Guide 131, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3346 — Phenoxyacetic acid derivative pesticide,Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.