Have you read an MSDS on Gasoline Accordign to Chevrons on Regular gas, the 12a is less dangerous by every standard, and agsoline carries significant cancer risks the refrigerant doesnt. 6oz of 12a, 12 gallons of gasoline. The stuff is basically LPG, what people use for .... While convnetional Freon isnt that flammable, if it blows out, its mixed with a mist fo compressor oil wihch IS flammable. Id say that hdyrocarbon refrigerants give very little to worry aobut. ...