☣️ UN 3349 • CLASS 6
UN 3349 — Pyrethroid pesticide, solid, poisonous
Placard: Toxic. ERG Guide 151. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
🚒☣️
⚠️ Verification required:
Broad or variable material category; verify exact product, SDS and shipping papers.
⚠️ 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.
Pyrethroid pesticide, solid, poisonous covers pyrethroid insecticide formulations where the exact active ingredient and carrier may vary by shipment. Confirm the product name on shipping papers or the SDS before choosing cleanup, extinguishing media or PPE.
Hazard overview: This entry is poisonous and may be fatal by inhalation, ingestion or skin absorption. Dust or decomposition products may be hazardous, especially in fire conditions.
Response guidance: Isolate the area using ERG 151, keep responders upwind and prevent runoff from entering drains or waterways. Use compatible extinguishing media for the formulation and avoid spreading contaminated liquid or dust.
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UN 3349 Quick Details
UN 3349
Product name: Pyrethroid pesticide, solid, poisonous
DOT Class: 6
Placard type: Toxic
ERG Guide: 151 (check current ERG)
Initial isolation: ERG 151: isolate spill 25m all directions; if large spill isolate 50m and consider evacuation 300m downwind
Common Hazards of UN 3349
- Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
- 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 may cause environmental contamination.
- Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive
- Containers may explode when heated.
- Runoff may pollute waterways.
Chemical Identity & Physical Properties
White to tan crystalline solid or powder with a faint odor. Stable at room temperature in dry conditions. Exact appearance can vary by commercial formulation.
| Also known as | Pyrethroid insecticideSynthetic pyrethrin pesticidePermethrin formulationCypermethrin productDeltamethrin solid |
| Appearance | White to tan crystalline solid or powder with a faint odor. Stable at room temperature in dry conditions. |
| Flash Point | Not applicable (non-flammable solid) |
| Boiling Point | Not applicable (decomposes before boiling, typically above 200C) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water, though may hydrolyze slowly in alkaline conditions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3349
Extinguishing Media
Dry chemical, CO2, water spray acceptable for fire control
PPE Requirements
⚠️ Level B minimum; full chemical-resistant suit, nitrile gloves, SCBA required; avoid all skin contact due to dermal toxicity
Use Level B minimum with SCBA and chemical-resistant suit, gloves and boots; upgrade protection for unknown concentration, vapor release or fire involvement.
Isolation & Evacuation
ERG 151: isolate spill 25m all directions; if large spill isolate 50m and consider evacuation 300m downwind
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 151).
First Actions for a UN 3349 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Isolate the spill or leak area in all directions; use the ERG guide and shipping papers to set exact distances.
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials, increase downwind precautions when vapor, dust, or runoff hazards are present.
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📋 Copy & Share Field Card
UN 3349 — Pyrethroid pesticide, solid, poisonousHAZMAT RADIO NOTE — UN 3349
Product: Pyrethroid pesticide, solid, poisonous
Class 6 / Toxic / ERG 151
PPE: Level B minimum; full chemical-resistant suit, nitrile gloves, SCBA required; avoid all skin contact due to dermal toxicity
ISOLATION: ERG 151: isolate spill 25m all directions; if large spill isolate 50m and consider evacuation 300m downwind
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 3349 — Pyrethroid pesticide, solid, poisonous
Class: 6 | Placard: Toxic | ERG Guide: 151
Appearance: White to tan crystalline solid or powder with a faint odor. Stable at room temperature in dry conditions.
Water Reactivity: No significant reaction with water, though may hydrolyze slowly in alkaline conditions
Extinguishing: Dry chemical, CO2, water spray acceptable for fire control
PPE: Level B minimum; full chemical-resistant suit, nitrile gloves, SCBA required; avoid all skin contact due to dermal toxicity
Isolation: ERG 151: isolate spill 25m all directions; if large spill isolate 50m and consider evacuation 300m downwind
— Key Hazards —
• Highly toxic, may be fatal if inhaled, ingested or absorbed through skin.
• Avoid any skin contact.
• Fire may produce irritating, corrosive and/or toxic gases.
— First Actions —
• CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Isolate the spill or leak area in all directions; use the ERG guide and shipping papers to set exact distances.
SOURCE: allfirefighter.com/hazmat/un/pyrethroid-pesticide-solid-poisonous-un-3349 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3349 Pyrethroid pesticide, solid, poisonous Cls6 ERG151 | allfirefighter.com/hazmat/un/pyrethroid-pesticide-solid-poisonous-un-3349SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/pyrethroid-pesticide-solid-poisonous-un-3349
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Frequently Asked Questions about UN 3349
UN 3349 is the entry for Pyrethroid pesticide, solid, poisonous. It should be treated as a poisonous pesticide formulation until the exact product is verified.
It is not primarily a flammable entry, but fire can produce toxic decomposition products.
Inhalation, ingestion and skin absorption can be dangerous; avoid all direct contact.
SCBA with chemical-resistant clothing, gloves and boots is recommended for emergency response.
Water spray may be used for cooling or fire control when compatible, but avoid runoff and avoid spreading contamination.
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.