At air concentrations below 1000 ppm propane is virtually non-toxic. Brief exposures to 10,000 ppm cause no symptoms; 100,000 ppm can produce slight dizziness after a few minutes of exposure, but is not noticeably irritating to the nose and throat.
Propane is a simple asphyxiant. High concentrations of propane can displace oxygen and cause asphyxiation. Oxygen content in the atmosphere must not be allowed to fall below 18%. Effects of oxygen deficiency are: 12-16% breathing and pulse rate increased, muscular co-ordination slightly disturbed; 10-14% emotional upset, abnormal fatigue, disturbed respiration; 6-10%: nausea and vomiting, collapse or loss of consciousness; below 6%: convulsive movements, possible respiratory collapse and death.
The gas does not affect the skin. Contact with liquified gas escaping from its high pressure cylinder may cause frostbite. Symptoms of mild frostbite include numbness, prickling and itching in the affected area. Symptoms of more severe frostbite include a burning sensation and stiffness of the affected area. The skin may become waxy white or yellow. Blistering, tissue death and gangrene may also develop in severe cases.
Close range contact with liquified propane gas may cause injury characteristic of a thermal burn with swelling, fluid accumulation and extreme redness. Tissue death and gangrene may also develop.
The gas does not cause eye irritation. Contact with liquified gas escaping from its high pressure cylinder may cause freezing of the eye. Permanent eye damage or blindness could result.
Not applicable to gases
No long-term effects have been reported from exposure to propane.
No specific data. Probably not carcinogenic.
No specific data. Probably has no reproductive effects.
No specific data. Probably has no teratogenic or embryotoxic effects.
No, propane does not act in a synergistic manner with other materials.
None
Document last updated on December 19, 1997
Copyright ©1997-2013 Canadian Centre for Occupational Health & Safety