E cigarettes are gaining popularity now and it has become an alternative to the traditional cigarettes that contain tobacco. In e cigarettes there are types of cartridges available like Propylene glycol (PG).

So what is Propylene glycol? It is syrupy liquid which is colorless and almost odorless which obtained from natural gas. It's use is vast such as in food products, cleaners, deodorizers, lipsticks and so on. Now it is being used as e cigarette cartridges.