High-Purity Silicon for Solar Cells (99.5%)
Polycrystalline silicon chunks with 99.5% silicon purity, used as raw material in photovoltaic cell manufacturing. Classified under HTS 2804.69.10.00 due to its elemental silicon content between 99% and 99.99% by weight, meeting Chapter 28 criteria for nonmetals. Not doped or processed beyond basic purification for semiconductor applications.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If purity 99.99% or higher
Exceeds 99.99% silicon threshold, moving to higher purity subheading in 2804.61.
If doped for electronics and cut into wafers/discs
Doping and processing into semiconductor forms like wafers classifies under 3818 per Chapter Note.
If mixed with other substances exceeding 1% impurities or as chemical mixture
Falls outside 'chemically defined' pure silicon, treated as other chemical preparations.
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Import Tips & Compliance
• Obtain third-party lab certification verifying silicon purity between 99-99.99% to avoid reclassification
• Declare as elemental silicon, not alloy, with detailed chemical analysis reports for CBP review
Related Products under HTS 2804.69.10.00
99.2% Pure Silicon Ingots for Electronics
Cylindrical silicon ingots at 99.2% purity, produced via Czochralski method for slicing into semiconductor wafers. Falls under HTS 2804.69.10.00 as unworked elemental silicon with purity 99-99.99%, distinct from higher purity or doped forms. Used in chip fabrication after further refinement.
99.3% Silicon Rods for Chemical Synthesis
Solid silicon rods at 99.3% purity, supplied as raw material for organosilicon compound production. HTS 2804.69.10.00 covers this form as elemental nonmetal silicon within purity specs, unworked rods under 50mm diameter. Used in direct process for silanes.
Polysilicon Chunks 99.8% for Photovoltaic Production
Granular polysilicon chunks with 99.8% silicon content, sourced from metallurgical grade upgrading for solar industry. HTS 2804.69.10.00 applies to this chemically defined nonmetal silicon in specified purity range. Impurities like iron and aluminum kept below 0.1% total.
Metallurgical Silicon Powder 99.1% Purity
Fine silicon powder at 99.1% purity, used in aluminum alloying and steel deoxidation processes. Classified in HTS 2804.69.10.00 for nonmetal silicon meeting 99-99.99% purity, in powder form but unworked. Particle size typically 100-200 mesh.
Granular Silicon 99.6% for Silicone Rubber Production
Granules of 99.6% pure silicon, feedstock for methylchlorosilane synthesis in silicone polymer manufacturing. Fits HTS 2804.69.10.00 as high-purity elemental silicon granules, chemically defined per Chapter 28 notes. Size range 1-5mm.