FIRST AID
• Move victim to fresh air.
• Call 911 or emergency medical service.
• Apply artificial respiration if victim is not breathing.
• Administer oxygen if breathing is difficult.
• Remove and isolate contaminated clothing and shoes.
• Clothing frozen to the skin should be thawed before being removed.
• In case of contact with liquefied gas, thaw frosted parts with lukewarm water.
• Keep victim warm and quiet.
• Ensure that medical personnel are aware of the material(s) involved, and take precautions to protect themselves.

(Source: Canada, The Transport Dangerous Goods Directorate)