Чистый пропан - это газ тяжелее воздуха, не имеющий запаха и вкуса, практически в воде не растворяющийся. При комнатной температуре (20°C) и давлении свыше 8.5 атмосфер переходит в жидкое состояние (плотность ~вдвое меньше, чем у воды). При нормальном давлении сжиженный пропан немедленно испаряется, давая понижение температуры порядка -40°C.

R600A refrigerant has a higher refrigerating coefficient than R-12; the use of R-600a isobutane reduces energy consumption; ozone depletion potential ODR=0; global warming potential of R600A refrigerant - GWP=0,001. R-600a refrigerant is a very promising freon for household refrigerators to replace R-12 refrigerant Compared to R12 and R134a refrigerants, isobutane has significant environmental advantages. This natural gas does not destroy ozone layer (ODP = 0) and does not contribute to greenhouse effect (GWP = 0,001). The mass of refrigerant circulating in the refrigeration unit when using isobutane is significantly reduced (by about 30%), for example, in a 130-liter refrigerator there are only 20 g of Isobutane, with 12 g dissolved in the refrigeration oil. Of course, small changes would be required in the refrigerator designs. But the compressors work on mineral oils using typical electrical insulation, sealing materials and pipes of the same diameter as when the compressor works, for example, on R-12! Besides, refrigeration units with freon R-600a are characterized by lower noise level due to low pressure in the working circuit. The specific mass of isobutane is 2 times higher than the specific mass of air, so in case of leakage the gaseous refrigerant R-600A flows on the ground. Isobutane dissolves well in mineral oil and has a higher refrigeration coefficient than R-12, which reduces energy consumption.