Electron grade Sulfur Hexafluoride gas high purity SF6 gas 1.Grade:99.9%-99.999%2. usage:Electronics equipment,transformer,refrigerating fluid3.Dangerous NO. : 22021 SF6 is nonflammable gas, permissible Exposure Limit of 1000 ppm.non-poisonous, colourless gas, and used for Electronics equipment,transformer,refrigerating fluid Electron grade Sulfur Hexafluoride gas high purity SF6 gas