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ISPAN Sulfur Hexafluoride (SF6) is a liquified gas under pressure and is administered by injection into the vitreous cavity. It is a colorless, odorless, non-toxic, non-flammable gas. The boiling point is -63.9°C (-83°F) and the vapor pressure at 20°C is 320 psig (pounds per square inch gauge). ISPAN SF6 purity: sulfur hexafluoride 99.99% (minimum), air 100 ppm (maximum), carbon tetrafluoride 100 ppm (maximum), and hydrogen fluoride 0.3 ppm (maximum).