Sodium chloride has a pH value of 7 at room temperature (25°C.) PH is a value that indicates the degree of acidity or alkalinity of a solution, i.e., the negative of the common logarithm of the concentration of hydrogen ions contained. Sodium chloride contains no hydrogen, so it is neutral and not acidic or basic. At the thermodynamic standard condition, an aqueous solution with PH = 7 is neutral, PH < 7 is acidic, and PH > 7 is basic. Sodium chloride is relatively stable and its aqueous solution is neutral. Industry generally uses electrolysis of saturated sodium chloride solution to produce hydrogen, chlorine and caustic soda (sodium hydroxide) and other chemical products. It can also be used in ore smelting (electrolysis of molten sodium chloride crystals to produce active metal sodium), medical treatment to configure saline, and life can be used for seasoning.