The aroma or the e-fluid-liquid consists essentially of the following ingredients:
--1,2-propylene glycol E 1520
--E 422 glycerol
--Ethanol
--Flavourings
--If nicotine

Propylene glycol (1,2-propanediol) is a clear, colorless, almost odorless and hygroscopic liquid. It is used for example in the manufacture of chewing gum and toothpaste, and recently even as a feed supplement for dairy cows. It is approved in the EU as a food additive and also bears the name E 1520.

The antimicrobial efficacy makes a use of other preservatives unnecessary. The aroma-containing fluid to about 90% propylene glycol. Apart from the electrical cigarette very important property to bind flavors, this substance for the "smoke" the eZigarette is responsible. Propylene glycol is also found in professional fog machine application.

Glycerin (glycerol, and glycerol) is the simplest form of a so-called trivalent alcohol. Glycerol at room temperature is a colorless, odorless viscous and hygroscopic liquid that tastes sweet. As a food additive is glycerin as a humectant, such as dates or use chewing gum. This bears the name of the triol E 422nd In an electric cigarette is the main function of glycerol, propylene glycol mist to give the more stable. By glycerol evaporates the "smoke" of a not so eZigarette quickly.

Ethanol is a colorless, flammable liquid with a characteristic, aromatic odor. Colloquially it is referred to as alcohol. Ethanol is known primarily as drinking alcohol, which is classified as a share in beverages (eg wine, beer, liquor).

Nicotine, and nicotine is an alkaloid that is found mainly in the tobacco plant. Pure nicotine is at room temperature, a colorless, oily liquid that turns brown in the air quickly. Nicotine is a drug and a nerve poison.