This standard specifies the requirements, test methods, inspection rules, signs, labels, packaging, transportation and storage of industrial sulfur hexafluoride. This standard applies to refined industrial sulfur hexafluoride formed by the intense reaction of sulfur and fluorine. This product is mainly used in electric power industry, metallurgical industry and meteorological department. Molecular formula: SF Molecular weight: 146.05 (according to the international atomic weight in 2001).