| Section2 = | Section3 = | Section7 = | Section8 = }} Propylene (or IUPAC name propene) is an organic compound having the chemical formula C3H6. It is the second simplest member of the alkene class of hydrocarbons, ethylene (ethene) being the simplest. At room temperature and pressure, propene is a colourless and inflammable gas. As it also has no smell, (as with most other gaseous hydrocarbons) it's mixed with minute quantites of mercaptans, sulforous compounds with a powerful garlic smell to… (More on Propylene)