From the polyurethane that makes our car seats to the paper made from bleached wood pulp,chlorine can be found in a variety of large-scale manufacturing processes. But while chlorine is profitable at activating the strong bonds of molecules, which allows manufacturers to synthesize the products we use on a daily basis, and it can be an insidious chemical,sometimes escaping into the environment as hazardous byproducts such as chloroform and dioxin.
Source: phys.org