Ultra-High Purity Sulfur Dioxide 99.999% Electronics
5N pure SO2 gas for semiconductor doping and plasma etching processes. Meets HTS 2811.29.30.00 as chemically pure inorganic oxygen compound of sulfur. Supplied in specialized cleanroom cylinders.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If halogenated SO2 derivatives
Chlorosulfonic acid or thionyl chloride (SOCl2) for electronics fall under halide oxides of nonmetals.
If doped wafers cut from SO2-processed silicon
Chemically doped semiconductor materials in disc/wafer form classify under 3818.
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Import Tips & Compliance
• Semiconductor industry requires particle count <10/partical; helium leak testing certification; ITAR/EAR export control screening
Related Products under HTS 2811.29.30.00
Industrial Grade Sulfur Dioxide Gas
Pure sulfur dioxide (SO2) gas supplied in high-pressure steel cylinders for industrial applications such as chemical synthesis and fumigation. Classified under HTS 2811.29.30.00 as it is a chemically defined inorganic oxygen compound of nonmetal sulfur, specifically sulfur dioxide. Meets Chapter 28 Note 1 requirements for pure chemical compounds.
Anhydrous Sulfur Dioxide for Wine Preservation
High-purity anhydrous SO2 gas used in winemaking to prevent oxidation and microbial growth. Falls under HTS 2811.29.30.00 as a chemically defined inorganic oxygen compound of sulfur per Chapter 28 definitions. Supplied in cylinders certified food-grade.
Sulfur Dioxide Calibration Gas Mixture 10ppm
Trace-level sulfur dioxide (10 ppm in nitrogen balance) in certified calibration cylinders for environmental air quality monitoring equipment. Primarily classified under HTS 2811.29.30.00 when SO2 is the principal compound, though mixtures may shift. Chemically defined per Chapter 28 Note 1.
Liquid Sulfur Dioxide for Chemical Synthesis
Liquefied SO2 at -10°C for use as reagent in sulfonation reactions and sulfite production. HTS 2811.29.30.00 covers this inorganic oxygen compound of nonmetal sulfur in pure form. Transported in insulated tank containers.
Food-Grade Sulfur Dioxide for Dried Fruit Processing
USP-grade SO2 gas for treating dried fruits and vegetables to prevent browning and spoilage. Classified HTS 2811.29.30.00 as pure chemically defined inorganic compound per Chapter 28. Provided in small cylinders for food processing.
Sulfur Dioxide for Pulp and Paper Bleaching
Technical grade SO2 gas dissolved on-site for bisulfite pulping and bleaching in paper manufacturing. HTS 2811.29.30.00 for the pure sulfur dioxide compound as defined in Chapter 28. Bulk cylinder deliveries.