• TOXIC; Extremely Hazardous.
• Inhalation extremely dangerous; may be fatal.
• Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.
• Odorless, will not be detected by sense of smell.

• EXTREMELY FLAMMABLE.

CAUTION: Flame can be invisible. Use an alternate method of detection (thermal camera, broom handle, etc.)

• May be ignited by heat, sparks or flames.
• Flame may be invisible.
• Containers may explode when heated.
• Vapor explosion and poison hazard indoors, outdoors or in sewers.
• Vapors from liquefied gas are initially heavier than air and spread along ground.
• Vapors may travel to source of ignition and flash back.
• Runoff may create fire or explosion hazard.

• CALL 911. Then call emergency response telephone number on shipping paper. If Shipping Paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Many gases are heavier than air and will spread along ground and collect in low or confined areas (sewers, basements, tanks, etc.).
• Ventilate closed spaces before entering, but only if properly trained and equipped.

• Wear positive pressure self-contained breathing apparatus (SCBA).
• Wear chemical protective clothing that is specifically recommended by the manufacturer when there is NO RISK OF FIRE.
• Structural firefighters' protective clothing provides thermal protection but only limited chemical protection.
• Always wear thermal protective clothing when handling refrigerated/cryogenic liquids.

Immediate precautionary measure.

• Isolate spill or leak area immediately for at least 100 meters (330 feet) in all directions.

• See Table 1 - Initial Isolation and Protective Action Distances.

• If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.

CAUTION: Flame can be invisible. Use an alternate method of detection (thermal camera, broom handle, etc.)

• DO NOT EXTINGUISH A LEAKING GAS FIRE UNLESS LEAK CAN BE STOPPED.

• Dry chemical, CO₂ or water spray.

• Water spray, fog or regular foam.
• If it can be done safely, move undamaged containers away from the area around the fire.

• Fight fire from maximum distance or use unmanned hose holders or monitor nozzles.
• Cool containers with flooding quantities of water until well after fire is out.
• Do not direct water at source of leak or safety devices; icing may occur.
• Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.
• ALWAYS stay away from tanks engulfed in fire.

• ELIMINATE all ignition sources (no smoking, flares, sparks or flames) in immediate area.
• All equipment used when handling the product must be grounded.
• Do not touch or walk through spilled material.
• Stop leak if you can do it without risk.
• Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material.
• Do not direct water at spill or source of leak.
• If possible, turn leaking containers so that gas escapes rather than liquid.
• Prevent entry into waterways, sewers, basements or confined areas.
• Isolate area until gas has dispersed.

Refer to the "General First Aid" Section
Specific First Aid:

• In case of contact with liquefied gas, only medical personnel should attempt thawing frosted parts.