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1,1,1,2-Tetrafluoroethane is the main alternative to CFCs jets, and at the same time, due to its low toxicity and non-flammability. It has been developed for medical aerosols, such as asthma aerosols for the prevention and treatment of asthma COPD (chronic obstructive pulmonary disease) and respiratory infections, nasal aerosols for the treatment of allergic rhinitis, foam aerosols, oral and topical aerosols.