SF6 gas, electrotechnical gas, is sulfur hexafluoride SF6. Sulfur hexafluoride is a non-toxic and inert, insulating and cooling gas of high dielectric strength. It is suitable for high-voltage and medium voltage power switches, for high-voltage cables and transformers, converters and particle accelerators. SF6 gas is also used as a gas for etching and chamber cleaning in the semiconductor industry. In addition, sulfur hexafluoride is the extinguishing agent, which actively put into fire suppression practice.