☣️ UN 1016 • CLASS 2
UN 1016 — Carbon monoxide, compressed
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 1016 Quick Details
UN 1016
Product name: Carbon monoxide, compressed
DOT Class: 2
Placard type: Toxic Gas
ERG Guide: 119 (check current ERG)
Initial isolation: ERG 119: Initial isolation 100m in all directions. Protect persons downwind. Large spill: consider initial evacuation 800m downwind. Evacuate area and allow gas to dissipate.
Common Hazards of UN 1016
- 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 | Carbon monoxideCOCarbonic oxideFlue gasCarbon oxide |
| CAS Number | 630-08-0 |
| Appearance | Colorless, odorless, tasteless gas at room temperature. Slightly lighter than air. Non-irritating, making it extremely dangerous as it provides no warning of exposure. |
| Flash Point | Not applicable (gas) |
| Boiling Point | -191.5C (-312.7F) |
| Vapor Density | 0.97 (slightly lighter than air) |
| Water Reactivity | No significant reaction with water |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 1016
Extinguishing Media
CO2, dry chemical, water spray for cooling containers; foam not typically required for gas fires
PPE Requirements
⚠️ Level A with SCBA required in high concentrations; Level B minimum. Self-contained breathing apparatus mandatory - odorless gas provides no warning. Chemical-resistant gloves for compressed cylinders.
Isolation & Evacuation
ERG 119: Initial isolation 100m in all directions. Protect persons downwind. Large spill: consider initial evacuation 800m downwind. Evacuate area and allow gas to dissipate.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 119).
First Actions for a UN 1016 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 1016 — Carbon monoxide, compressedHAZMAT RADIO NOTE — UN 1016
Product: Carbon monoxide, compressed
Class 2 / Toxic Gas / ERG 119
PPE: Level A with SCBA required in high concentrations; Level B minimum. Self-contained breathing apparatus mandatory - odorless gas provides no warning. Chemical-resistant gloves for compressed cylinders.
ISOLATION: ERG 119: Initial isolation 100m in all directions. Protect persons downwind. Large spill: consider initial evacuation 800m downwind. Evacuate area and allow gas to dissipate.
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 1016 — Carbon monoxide, compressed
Class: 2 | Placard: Toxic Gas | ERG Guide: 119
Appearance: Colorless, odorless, tasteless gas at room temperature. Slightly lighter than air. Non-irritating, making it extremely dangerous as it provides no warning of exposure.
Water Reactivity: No significant reaction with water
Extinguishing: CO2, dry chemical, water spray for cooling containers; foam not typically required for gas fires
PPE: Level A with SCBA required in high concentrations; Level B minimum. Self-contained breathing apparatus mandatory - odorless gas provides no warning. Chemical-resistant gloves for compressed cylinders.
Isolation: ERG 119: Initial isolation 100m in all directions. Protect persons downwind. Large spill: consider initial evacuation 800m downwind. Evacuate area and allow gas to dissipate.
— 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/1016 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN1016 Carbon monoxide, compressed Cls2 ERG119 | allfirefighter.com/hazmat/un/1016SMS / 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/1016
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Frequently Asked Questions about UN 1016
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 with SCBA required in high concentrations; Level B minimum. Self-contained breathing apparatus mandatory - odorless gas provides no warning. Chemical-resistant gloves for compressed cylinders.
Water reactivity: No significant reaction with water. Recommended extinguishing: CO2, dry chemical, water spray for cooling containers; foam not typically required for gas fires.
ERG Guide 119 recommendation: ERG 119: Initial isolation 100m in all directions. Protect persons downwind. Large spill: consider initial evacuation 800m downwind. Evacuate area and allow gas to dissipate.
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.