The density of rubbing alcohol, which goes by the chemical name isopropyl alcohol, is 0.79 grams per milliliter at 20 degrees Celsius and 1 atmosphere of pressure. The density of a liquid changes depending on ambient temperature and pressure.
The vapor from rubbing alcohol is denser than air. Density is calculated by dividing the mass by the volume.
Isopropyl alcohol has a molar mass of 60.1 grams per mole and is written with the chemical formula C3H8O. Its boiling point is 180.7 degrees Fahrenheit, and its melting point is minus 128 degrees Fahrenheit. Other names for rubbing alcohol include isopropanol and 2-propanol.