Sulfur hexafluoride is a gas used in medical field as test gas in respiratory mechanism due the is inert in body. The is largely used as electrical insulator. In comparison with its lot of applications, sulfur hexafluoride is a potent greenhouse gas
Formula and structure: The sulfur hexafluoride chemical formula is SF6 and also its molar mass is 146.00554 g mol-1. The framework of sulfur hexafluoride is octahedron, v 6 fluorine atom bound come a central sulfur atom. Every S-F bond has actually a 90º angle. Its chemical structure deserve to be created as below, in the common representations offered for organic molecules.
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Occurrence: Sulfur hexafluoride gas and also the various other SxFy gases, were not freely- created by nature. However, in this days this are uncovered in the environment as component of greenhouse gases.
Preparation: Sulfur hexafluoride is synthesized by expositing element sulfur (crystal hard S8) and elemental fluorine (gas F2) in ~ 300 ºC. ~ the reaction finishes, the SF6 is purified by heater or alkali washing come remove other SxFy gases.
1/8S8 + 3F2 → SF6
Physical properties: sulfur hexafluoride is a colorless, tasteless and odorless gas. SF6 is non-flammable and it is 6 times heavier 보다 air, its thickness is 6.602 g mL-1. That boiling point is -64 ºC. It is slightly soluble in water and also other polar solvents. Sulfur hexafluoride is shipped together a liquefied gas.
Chemical properties: In spite, sulfur hexafluoride has 6 fluorine atoms, which is the most electronegative atom in the regular table, its dipole minute is 0. That is since the octahedral geometry allow the cancelation of every dipoles associated to the six S-F bonds. In consequence, sulfur hexafluoride is a non-polar molecule that is just slightly soluble in polar compounds. Other necessary fact about the chemistry that SF6, that is a an extremely stable compound, thus it can not be enclosed by other chemical compounds and can be current in the atmosphere for many decades, which is an environmental problem.
Uses: Sulfur hexafluoride is generally used, together dielectric medium in the production of electrical equipment owe its high relative permittivity. The magnesium market is the second major consumed of sulfur hexafluoride, where it works as a gas come fill spreading forms. Thus, SF6 has actually a selection of application in the medicine, where it is offered in retinal surgeries to fix the vitreous chamber. Moreover, sulfur hexafluoride is injected as comparison agent because that ultrasound imaging.
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Health effects/safety hazards: sulfur hexafluoride is non-toxic, yet it could be dangerous once inhaled large quantity that gas and it can lead come asphyxia. SF6 is the most potent greenhouse gas (gas responsible by the global warming) due its long-time life and its volume to absorb or emit radiation in the atmosphere.