UN 3345 — Phenoxyacetic acid derivative pesticide, solid, poisonous
Placard: Toxic. ERG Guide 153. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 3345 is Phenoxyacetic acid derivative pesticide, solid, poisonous, a toxic phenoxyacetic pesticide solid assigned to ERG Guide 153. Dust, skin exposure and runoff control are priorities.
Hazard overview: TOXIC phenoxyacetic acid derivative pesticide solid; inhalation of dust, ingestion or skin absorption may cause injury. Dust can contaminate clothing, tools, soil and runoff. Combustible solid behavior depends on formulation and carrier.
Response guidance: For UN 3345, isolate the area, avoid skin contact and use SCBA for dust/vapor/fire. Contain pesticide runoff and verify active ingredient with SDS and ERG 153.
Firefighter training notes: Training for UN 3345 should emphasize product verification, SCBA use, exposure control, decontamination, runoff containment and SDS/shipping paper review. Use ERG 153, SDS and local SOP.
Regulatory context: Phenoxyacetic acid derivative pesticide, solid, 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, solid, 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 3345 Quick Details
Common Hazards of UN 3345
- TOXIC phenoxyacetic acid derivative pesticide solid; inhalation of dust, ingestion or skin absorption may cause injury.
- Dust can contaminate clothing, tools, soil and runoff.
- Combustible solid behavior depends on formulation and carrier.
- Fire may produce hydrogen chloride, phenoxy/organic acid smoke and other toxic pesticide decomposition products.
- Runoff may be toxic, persistent and harmful to waterways.
- Avoid dust generation and unprotected skin contact.
- Exact active ingredient, salt/ester form and concentration must be verified from SDS.
Chemical Identity & Physical Properties
White to tan crystalline solid or powder at room temperature. Odor varies by specific compound, typically mild herbicidal or aromatic odor. May be formulated as granules or pellets.
| Also known as | Phenoxy herbicide solid2,4-D type pesticideMCPA-type herbicideChlorophenoxy pesticide solid |
| Appearance | White to tan crystalline solid or powder at room temperature. Odor varies by specific compound, typically mild herbicidal or aromatic odor. May be formulated as granules or pellets. |
| Flash Point | Not applicable (solid pesticide, typically non-flammable) |
| Boiling Point | Not applicable (decomposes before boiling, typically >200C) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water, though may slowly hydrolyze in alkaline conditions |
Fireground Response Guidance — UN 3345
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 3345 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.
- 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 153, SDS, shipping papers and monitoring to set isolation, evacuation and entry decisions.
📋 Copy & Share Field Card
UN 3345 — 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.