The substance is found in products such as brake linings and gaskets and is used to manufacture chlorine bleach and sodium hydroxide, also known as caustic soda, including some that is used for ...

producing sodium hydroxide, hydrogen gas, and heat. Chlorine is different, for it is a poisonous, yellow-green gas, with a very sharp odor. It was used in gas warfare during World War I.

Further, a photo-chloralkali (PCA) process converts leftover brine into hydrogen, chlorine, and sodium hydroxide, with the help of photo-active material Cu₂O. In addition, the proton exchange ...