UN 3347 — Phenoxyacetic acid derivative pesticide, liquid, poisonous, flammable
Placard: Toxic. ERG Guide 131. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3347 is Phenoxyacetic acid derivative pesticide, liquid, poisonous, flammable, 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 3347, 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 3347 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, poisonous, flammable 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, poisonous, flammable should be stored in tightly closed compatible containers or packages with ventilation, secondary containment, restricted access and SDS-based segregation from incompatible materials.
UN 3347 Quick Details
Common Hazards of UN 3347
- 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
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.
| 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 |
Fireground Response Guidance — UN 3347
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 3347 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 3347 — 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.