It is a very small molecule composed of 3 carbon atoms, 2 oxygen atoms and 8 hydrogen atoms. It is a clear, colorless, viscous liquid that is odorless and has a slightly sweet taste. Chemically classified as a diol, it can be mixed with various solvents such as water, acetone, and chloroform. It mixes with water in all proportions, but less so with alcohols, esters and ketones.