Silicon Carbide Raw Precursor
Elemental silicon lumps serving as precursor for silicon carbide (SiC) abrasive production via the Acheson process. These are unworked silicon lumps, meeting Chapter 28 Note 1 as separate chemical elements. They are classified as 'other' silicon under this tariff item, as they are not doped for electronics and do not meet the higher purity threshold for subheading 2804.61.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the silicon purity is 99.99% or higher
Higher purity silicon is classified under the specific subheading for silicon containing 99.99% or more by weight.
If the silicon has been converted to silicon carbide
Silicon carbide is classified in heading 28.49 as carbides, not as elemental silicon.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Ensure the lumps are not doped for electronics and are in unworked form
• Provide a certificate of analysis showing silicon purity and impurity levels
• Declare the goods as elemental silicon for industrial use, but note that end-use does not affect classification
Related Products under Tariff item 2804.69.00
99.2% Pure Silicon Ingots for Electronics
Cylindrical silicon ingots at 99.2% purity, produced via the Czochralski method for slicing into semiconductor wafers. These are unworked elemental silicon in a form suitable for further processing, meeting the requirements of Chapter 28 Note 1 as separate chemical elements. They fall under this tariff item as 'other' silicon, not doped for electronics and not in the form of discs, wafers, or similar forms.
99.3% Silicon Rods for Chemical Synthesis
Solid silicon rods at 99.3% purity, supplied as raw material for organosilicon compound production. These are unworked rods, not doped for electronics, and meet the definition of separate chemical elements in Chapter 28 Note 1. They are classified as 'other' silicon under this tariff item, as they do not meet the higher purity threshold for subheading 2804.61.
Chemical Synthesis Silicon Chunks
Irregular silicon chunks with 98-99% purity, used for organosilicon compound manufacturing like silanes. These are chemically defined elemental silicon in chunk form, meeting Chapter 28 Note 1 requirements. They are classified as 'other' silicon under this tariff item, as the purity is below 99.99% and the chunks are not doped for electronics.
Granular Silicon 99.6% for Silicone Rubber Production
Granules of 99.6% pure silicon, used as feedstock for methylchlorosilane synthesis in silicone polymer manufacturing. These are chemically defined elemental silicon in granular form, meeting Chapter 28 Note 1 requirements. They are classified as 'other' silicon under this tariff item, as the purity is below 99.99% and the granules are not doped for electronics.
High-Purity Silicon for Solar Cells (99.5%)
Polycrystalline silicon chunks with 99.5% silicon purity, used as raw material in photovoltaic cell manufacturing. These are unworked elemental silicon in chunk form, meeting Chapter 28 Note 1 as separate chemical elements. They are classified as 'other' silicon under this tariff item, as the purity is below 99.99% and the chunks are not doped for electronics.
Metallurgical Grade Silicon
High-purity silicon used primarily in the production of aluminum-silicon alloys and steel additives. It is chemically defined as elemental silicon meeting Chapter 28 Note 1 requirements. This silicon is classified as 'other' under this tariff item, as it is not doped for electronics and does not meet the higher purity threshold for subheading 2804.61.