If you are ready to embrace this lifestyle, follow this guide. Note that version 9.1 is a legacy release. NIST has since released newer versions (10, 11), but the aesthetic preference for 9.1 is strong among purists due to its smaller footprint and no-nonsense GUI.

: Increased the number of pure fluids to 121, including new entries like diethyl ether, ethylbenzene, and various refrigerants.