It is important to note that REFPROP is ; it is a fee-based Standard Reference Database (SRD 23) distributed by the National Institute of Standards and Technology.

While NIST REFPROP 9.1 might seem to be a tool confined to the realm of engineering and physical sciences, its influence extends into various aspects of daily life, contributing to enhancements in lifestyle and entertainment.

NIST REFPROP 9.1 is a legacy version of the database used for calculating the thermodynamic and transport properties of industrial fluids. Download and Official Status