• Vapors may cause dizziness or asphyxiation without warning.
• Vapors from liquefied gas are initially heavier than air and spread along ground.
• Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite.

• Non-flammable gases.
• Containers may explode when heated.
• Ruptured cylinders may rocket.

• 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).
• Structural firefighters' protective clothing provides thermal protection but only limited chemical protection.
• Always wear thermal protective clothing when handling refrigerated/cryogenic liquids or solids.

Immediate precautionary measure.

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

• Consider initial downwind evacuation for at least 100 meters (330 feet).

• 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.

• Use extinguishing agent suitable for type of surrounding fire.
• If it can be done safely, move undamaged containers away from the area around the fire.
• Damaged cylinders should be handled only by specialists.

• 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.

• 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.
• Allow substance to evaporate.
• Ventilate the area.

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

• Clothing frozen to the skin should be thawed before being removed.
• In case of contact with liquefied gas, only medical personnel should attempt thawing frosted parts.