☣️ UN 3160 • CLASS 2
UN 3160 — Liquefied gas, poisonous, flammable, n.o.s. (Inhalation Hazard Zone A)
Placard: Toxic Gas. ERG Guide 119. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ 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.
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UN 3160 Quick Details
UN 3160
Product name: Liquefied gas, poisonous, flammable, n.o.s. (Inhalation Hazard Zone A)
DOT Class: 2
Placard type: Toxic Gas
ERG Guide: 119 (check current ERG)
Initial isolation: ERG 119: Initial isolation 100m all directions. Protective action distance: large spill day 2.5km, night 5.3km; small spill day 0.5km, night 2.1km. Evacuate downwind areas immediately.
Common Hazards of UN 3160
- TOXIC; may be fatal if inhaled or absorbed through skin. Some may cause severe skin burns and
- Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
- Fire will produce irritating, corrosive and/or toxic gases.
- Runoff from fire control or dilution water may cause environmental contamination.
- Flammable; may be ignited by heat, sparks or flames.
- May form explosive mixtures with air. Ethylene oxide (UN1040) may react explosively even in the
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- Vapors from liquefied gas are initially heavier than air and spread along ground.
Chemical Identity & Physical Properties
| Also known as | Toxic liquefied gas NOSPoisonous compressed gas flammableLiquefied poisonous gas Zone AToxic flammable gas liquefied |
| Appearance | Variable appearance depending on specific gas; liquefied under pressure, colorless to pale yellow in most cases. May have characteristic odor or be odorless. Stored as compressed liquefied gas; vapors heavier than air. |
| Flash Point | Not applicable (flammable gas) |
| Boiling Point | Variable, typically below room temperature (liquefied gas) |
| Vapor Density | Greater than 1 (heavier than air) |
| Water Reactivity | Variable; some may react with water to produce toxic or corrosive gases. Avoid water contact unless material compatibility is confirmed. |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3160
Extinguishing Media
Dry chemical, CO2, or inert gas blanketing preferred; avoid water spray on leak or spill due to potential reactivity and vapor spread
PPE Requirements
⚠️ Level A required: fully encapsulated chemical protective suit with SCBA. Extreme inhalation hazard Zone A; skin absorption risk. Thermal protection for cryogenic exposure.
Isolation & Evacuation
ERG 119: Initial isolation 100m all directions. Protective action distance: large spill day 2.5km, night 5.3km; small spill day 0.5km, night 2.1km. Evacuate downwind areas immediately.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 119).
First Actions for a UN 3160 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Many gases are heavier than air and will spread along the ground and collect in low or confined areas
- Ventilate closed spaces before entering, but only if properly trained and equipped.
- Isolate spill or leak area for at least 100 meters (330 feet) in all directions.
- For highlighted materials: see Table 1 - Initial Isolation and Protective Action Distances.
- For non-highlighted materials: increase the immediate precautionary measure distance, in the downwind
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📋 Copy & Share Field Card
UN 3160 — Liquefied gas, poisonous, flammable, n.oHAZMAT RADIO NOTE — UN 3160
Product: Liquefied gas, poisonous, flammable, n.o.s. (Inhalation Hazard Zone A)
Class 2 / Toxic Gas / ERG 119
PPE: Level A required: fully encapsulated chemical protective suit with SCBA. Extreme inhalation hazard Zone A; skin absorption risk. Thermal protection for cryogenic exposure.
ISOLATION: ERG 119: Initial isolation 100m all directions. Protective action distance: large spill day 2.5km, night 5.3km; small spill day 0.5km, night 2.1km. Evacuate downwind areas immediately.
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 3160 — Liquefied gas, poisonous, flammable, n.o.s. (Inhalation Hazard Zone A)
Class: 2 | Placard: Toxic Gas | ERG Guide: 119
Appearance: Variable appearance depending on specific gas; liquefied under pressure, colorless to pale yellow in most cases. May have characteristic odor or be odorless. Stored as compressed liquefied gas; vapors heavier than air.
Water Reactivity: Variable; some may react with water to produce toxic or corrosive gases. Avoid water contact unless material compatibility is confirmed.
Extinguishing: Dry chemical, CO2, or inert gas blanketing preferred; avoid water spray on leak or spill due to potential reactivity and vapor spread
PPE: Level A required: fully encapsulated chemical protective suit with SCBA. Extreme inhalation hazard Zone A; skin absorption risk. Thermal protection for cryogenic exposure.
Isolation: ERG 119: Initial isolation 100m all directions. Protective action distance: large spill day 2.5km, night 5.3km; small spill day 0.5km, night 2.1km. Evacuate downwind areas immediately.
— Key Hazards —
• TOXIC; may be fatal if inhaled or absorbed through skin. Some may cause severe skin burns and
• Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
• Fire will produce irritating, corrosive and/or toxic gases.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Many gases are heavier than air and will spread along the ground and collect in low or confined areas
SOURCE: allfirefighter.com/hazmat/un/3160 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3160 Liquefied gas, poisonous, flammable, n.o.s. (Inhalation Hazard Zone A) Cls2 ERG119 | allfirefighter.com/hazmat/un/3160SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/3160
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Frequently Asked Questions about UN 3160
TOXIC; may be fatal if inhaled or absorbed through skin. Some may cause severe skin burns and Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause environmental contamination. Flammable; may be ignited by heat, sparks or flames. May form explosive mixtures with air. Ethylene oxide (UN1040) may react explosively even in the Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Vapors from liquefied gas are initially heavier than air and spread along ground.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level A required: fully encapsulated chemical protective suit with SCBA. Extreme inhalation hazard Zone A; skin absorption risk. Thermal protection for cryogenic exposure.
Water reactivity: Variable; some may react with water to produce toxic or corrosive gases. Avoid water contact unless material compatibility is confirmed.. Recommended extinguishing: Dry chemical, CO2, or inert gas blanketing preferred; avoid water spray on leak or spill due to potential reactivity and vapor spread.
ERG Guide 119 recommendation: ERG 119: Initial isolation 100m all directions. Protective action distance: large spill day 2.5km, night 5.3km; small spill day 0.5km, night 2.1km. Evacuate downwind areas immediately.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 119 and your department SOP/SOG for incident-specific protective actions.
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.