NIST REFPROP 9.0 (REFerence PROPerties) is a legacy version of the industry-standard software developed by the National Institute of Standards and Technology (
Supercritical carbon dioxide (scCO2) is used for decaffeination, dry cleaning, and particle formation. REFPROP 9 accurately predicts the dramatic changes in density and solubility near the critical point (Tc=304K, Pc=73.8 bar), which is impossible with cubic equations of state. nist refprop 9
Phase Coverage: Provides accurate data across liquid, gas, and supercritical phases. Common Applications Windows XP/Vista/7/8/10 (32-bit or 64-bit)
Density: 421.33 kg/m³
Viscosity: 1.87e-5 Pa·s
Thermal Conductivity: 0.189 W/(m·K) nist refprop 9
The software provides highly accurate calculations for a wide range of properties over various conditions (liquid, gas, and supercritical phases):
REFPROP 9 significantly expanded the database from previous versions:
refprop.dll, refprop.hlp, etc.).