The chemical formula for chlorine is Cl2. This diatomic molecule is formed by two chlorine atoms. The bonding between these two atoms is weak, making the chlorine molecule highly reactive.
This yellow-green gas has an intense odor and is exceedingly toxic. In its solid and liquid form, chlorine is a powerful bleaching, disinfecting and oxidizing agent. Chlorine is used in the production of polyvinyl chloride, a plastic used in car interiors, water pipes, vinyl flooring and blood bags. It is also used in making chloroform. Chlorine combines with compounds such as oxygen and nitrogen to form chlorides and oxides, such as chlorine dioxide and dichlorine monoxide.