☣️ UN 3354 • CLASS 2
UN 3354 — Insecticide gas, flammable, n.o.s.
Placard: Flammable Gas. ERG Guide 115. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ 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.
UN 3354 At a Glance
UN 3354 (Insecticide gas, flammable) is listed as DOT Class 2 Flammable Gas and is assigned to ERG Guide 115. Use this page to review placard data, common hazards, PPE notes, isolation context, first actions, and related UN numbers.
UN 3354 covers flammable insecticide gases or fumigant gases where the exact gas must be confirmed from the cylinder, label or shipping paper.
Hazard overview: The primary hazards are extreme flammability, vapor cloud ignition, flashback and pressure vessel rupture if heated.
Response guidance: Isolate at least 100 m initially, remove ignition sources and do not extinguish a leaking gas fire unless the leak can be stopped safely.
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UN 3354 Quick Details
UN 3354
Product name: Insecticide gas, flammable, n.o.s.
DOT Class: 2
Placard type: Flammable Gas
ERG Guide: 115 (check current ERG)
Initial isolation: ERG 115: Initial isolation 100m in all directions; Protective action distance up to 800m downwind for large spills during day
Common Hazards of UN 3354
- EXTREMELY FLAMMABLE.
- Will be easily ignited by heat, sparks or flames.
- Will form explosive mixtures with air.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
- Vapors may travel to source of ignition and flash back.
- Cylinders exposed to fire may vent and release flammable gas through pressure relief devices.
- Containers may explode when heated.
- Ruptured cylinders may rocket.
Chemical Identity & Physical Properties
Compressed or liquefied gas, typically colorless to pale yellow with a characteristic chemical or solvent-like odor. May be under pressure in cylinders or aerosol containers.
| Also known as | Insecticide gas n.o.s.Flammable insecticide aerosolPesticide gas flammableFumigant gas flammable |
| Appearance | Compressed or liquefied gas, typically colorless to pale yellow with a characteristic chemical or solvent-like odor. May be under pressure in cylinders or aerosol containers. |
| Flash Point | Not applicable (flammable gas) |
| Boiling Point | Not applicable (varies by formulation) |
| Vapor Density | Heavier than air (typically >1) |
| Water Reactivity | No significant reaction with water, though may have limited solubility |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3354
Extinguishing Media
CO2, dry chemical, water spray for cooling containers only; do not extinguish leak fire unless leak can be stopped
PPE Requirements
⚠️ Level B minimum with SCBA required; gas-tight chemical protective clothing if contact with liquefied gas possible; thermal protection if fire involved
Use SCBA and Level B protection; use gas-tight chemical protection if liquefied gas contact is possible.
Isolation & Evacuation
ERG 115: Initial isolation 100m in all directions; Protective action distance up to 800m downwind for large spills during day
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 115).
First Actions for a UN 3354 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.
- Many gases are heavier than air and may collect in low or confined areas.
- Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
- Consider initial downwind evacuation for at least 800 meters (1/2 mile).
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UN 3354 — Insecticide gas, flammable, n.o.s.HAZMAT RADIO NOTE — UN 3354
Product: Insecticide gas, flammable, n.o.s.
Class 2 / Flammable Gas / ERG 115
PPE: Level B minimum with SCBA required; gas-tight chemical protective clothing if contact with liquefied gas possible; thermal protection if fire involved
ISOLATION: ERG 115: Initial isolation 100m in all directions; Protective action distance up to 800m downwind for large spills during day
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 3354 — Insecticide gas, flammable, n.o.s.
Class: 2 | Placard: Flammable Gas | ERG Guide: 115
Appearance: Compressed or liquefied gas, typically colorless to pale yellow with a characteristic chemical or solvent-like odor. May be under pressure in cylinders or aerosol containers.
Water Reactivity: No significant reaction with water, though may have limited solubility
Extinguishing: CO2, dry chemical, water spray for cooling containers only; do not extinguish leak fire unless leak can be stopped
PPE: Level B minimum with SCBA required; gas-tight chemical protective clothing if contact with liquefied gas possible; thermal protection if fire involved
Isolation: ERG 115: Initial isolation 100m in all directions; Protective action distance up to 800m downwind for large spills during day
— Key Hazards —
• EXTREMELY FLAMMABLE.
• Will be easily ignited by heat, sparks or flames.
• Will form explosive mixtures with air.
— 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.
• Many gases are heavier than air and may collect in low or confined areas.
SOURCE: allfirefighter.com/hazmat/un/insecticide-gas-flammable-n-un-3354 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
UN3354 Insecticide gas, flammable, n.o.s. Cls2 ERG115 | allfirefighter.com/hazmat/un/insecticide-gas-flammable-n-un-3354SMS / 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/insecticide-gas-flammable-n-un-3354
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Frequently Asked Questions about UN 3354
UN 3354 is the entry for flammable insecticide gas, n.o.s.
Yes. It is an extremely flammable gas and can form explosive mixtures with air.
Do not extinguish the flame unless the gas leak can be stopped safely.
SCBA and protective clothing are required; upgrade if liquefied gas contact is possible.
Isolate the area, control ignition sources and keep personnel upwind.
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.