The lowest cost oxidant is chlorine gas, whose average price is $2 per pound. The price of deriving bulk industrial chlorine gas from salt through electrolysis has gone up in recent times. The supply of bulk industrial chlorine that in the past went primarily to industrialized regions such as the US and Europe, is now being divided to meet the demand in Southeast Asia, particularly in China. Chlorine is a yellowish-green gas at standard temperature and pressure. Cl2 gas is extremely reactive with most elements. It is a respiratory irritant, and it burns the skin.