99.995% (4.5N) Sulfur Hexafluoride Gas

Product Category: Sulfur Hexafluoride

Chinese Name: Sulfur Hexafluoride Gas
Chemical Formula: SF6
Purity: 99.995% (4.5N)
Packaging: 10L, 15L, 40L
Net Weight: 10kg, 20kg, 50kg

Related Parameters of Sulfur Hexafluoride Gas

Chinese Name: Sulfur Hexafluoride Gas

Chemical Formula: SF6

Purity: 99.995% (4.5N)

Packaging: 10L, 15L, 40L

Net Weight: 10kg, 20kg, 50kg

Introduction to Sulfur Hexafluoride Gas

Sulfur hexafluoride gas is a colorless, odorless, non-toxic, and non-corrosive compound. Under normal temperature and pressure, it exists as a gas and is non-flammable, making it the most chemically stable non-metallic oxide. Due to its excellent chemical and thermal stability, sulfur hexafluoride gas does not decompose even at temperatures up to 500°C when purity is ensured. It possesses outstanding insulation and arc-quenching capabilities; even if it momentarily decomposes and ionizes under an electric arc, it quickly returns to its original stable state once the arc is extinguished. Therefore, owing to its high chemical stability and excellent electrical insulation properties, it is widely used in the electrical industry and as an ultra-high voltage insulating material. Additionally, it features a high thermal conductivity coefficient and effective cooling performance.

Sulfur hexafluoride gas is extensively used as an insulating material and arc-quenching medium in high-voltage and medium-voltage electrical equipment. It serves as an anti-oxidant in metal smelting and manufacturing processes, a tracer in meteorological experiments, a refrigerant and heat carrier in refrigeration processes, and an insulator in X-ray equipment in the medical field. It is also used in the production of monocrystalline silicon and in fundamental theoretical scientific research.

Sulfur Hexafluoride Gas Product Standards and Test Results

Physical and Chemical Properties of Sulfur Hexafluoride Gas

Sulfur hexafluoride (SF6 gas) is a colorless, odorless, non-toxic, non-flammable, and non-corrosive inert gaseous substance under normal pressure. Gas density: 6.139 g/L (20°C, 0.101 MPa); Melting point: -50.8°C; Freezing point: -63.8°C; Critical temperature: 45.64°C; Critical pressure: 3.84 MPa; Critical density: 0.73 g/cm³; Critical volume: 198 mL/mol; Dielectric constant: 1.002026 (25°C, 0.101 MPa). Sulfur hexafluoride exhibits strong chemical stability, remaining undecomposed at 500°C–600°C, and does not react with acids, alkalis, salts, ammonia, water, etc. Under arc conditions (thousands of degrees), it decomposes into atomic sulfur and fluorine gases, but upon arc extinction, it recombines into sulfur hexafluoride within 10⁻⁵–10⁻⁶ seconds. Sulfur hexafluoride possesses excellent electrical insulation properties and superior arc-quenching capabilities. Its dielectric strength is 2.5 times that of nitrogen at the same pressure, its breakdown voltage is 2.5 times that of air, and its arc-quenching ability is 100 times that of air, making it a next-generation high-voltage insulating medium superior to air and oil.