a mixture of two or more refrigerants in which the liquid and
vapor have same composition at equilibrium. In addition, the
resulting pressure of the mixture is either higher or lower
than the pressure of any of the components. Azeotropes behave
like pure component refrigerants because there is no change
in boiling temperature or shift in composition during phase
change, equipment operation, or leakage.
to be a "higher capacity" R-12 type refrigerant,
R-500 found some use in air conditioning and dehumidifier equipment
and in positive pressure centrifugal chillers.