2812.90.00.10 - Sulfur hexafluoride

This classification specifically identifies sulfur hexafluoride (SF6) within the broader category of halides and halide oxides of nonmetals. Sulfur hexafluoride is a synthetic, colorless, odorless, and non-flammable gas with unique dielectric and insulating properties. Its primary application is in the electrical industry as an insulating gas in high-voltage switchgear, circuit breakers, and gas-insulated substations due to its exceptional ability to prevent electrical arcing. It also finds use in specialized applications such as semiconductor manufacturing as an etching gas and in some medical imaging techniques.

This specific subheading, 2812.90.00.10, is distinct from its sibling category, 2812.90.00.90, which covers "Other" halides and halide oxides of nonmetals not elsewhere specified. While both fall under the umbrella of "Other" within the Halides and halide oxides of nonmetals chapter, 2812.90.00.10 is dedicated solely to sulfur hexafluoride due to its widespread industrial significance and distinct properties. The sibling category would encompass other less common or unlisted nonmetal halides and oxides.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Therefore, classification within this subheading is precise, requiring the confirmation that the imported or exported substance is indeed sulfur hexafluoride. The primary classification criterion is the chemical identity of the substance itself.