R-134a cylinder Mixtures with air of the gas<unk>  are not flammable at atmospheric pressure and temperatures up to<unk> 00 °C <unk> 12 °F). However, mixtures with high concentrations of air at elevated pressure and/or temperature can be ignited. Contact of<unk>  with flames or hot surfaces in excess of<unk> 50 °C (482 °F) may cause vapor decomposition and the emission of toxic gases including hydrogen fluoride and carbonyl fluoride, however the decomposition temperature has been reported as above 370°C.<unk>  itself has an of<unk> ,500 g/m in rats, making it relatively non-toxic, apart from the dangers inherent to inhalant abuse. Its gaseous form is denser than air and will displace air in the lungs. This can result in asphyxiation if excessively inhaled. This contributes to most deaths by inhalant abuse. Aerosol cans containing<unk> , when inverted, become effective freeze sprays. Under pressure,<unk>  is compressed into a liquid, which upon vaporization absorbs a significant amount of thermal energy. As a result, it will greatly lower the temperature of any object it contacts as it evaporates. Freon<unk> 34a refrigerant for car AC
1,1,1,2-Tetrafluoroethane
Triphenylbromoethylene
Vinyl chloride
Triphenylchloroethylene
Ethylene glycol
Diethyl ether
Desmethylchlorotrianisene
Chloroethane