Chemical Synthesis Silicon Chunks
Irregular silicon chunks (98-99% purity) for organosilicon compound manufacturing like silanes. Chemically defined under 2804.69.50.00 as other nonmetal silicon.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If further processed into organosilicon compounds
Organic silicon derivatives move to Chapter 29 per Chapter 28 exclusions.
If ultra-high purity chunks
Exceeds 'pure' threshold for semiconductor applications.
If with organic stabilizers
Stabilized silicon mixtures excluded from pure elemental classification.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Submit intended end-use affidavits if borderline with Chapter 29 organosilicons
• Ensure inert atmosphere packaging certifications for reactive material
Related Products under HTS 2804.69.50.00
Silicon Carbide Raw Precursor
Elemental silicon lumps serving as precursor for silicon carbide (SiC) abrasive production via Acheson process. Falls under 2804.69.50.00 as nonmetal silicon not pure or semiconductor-grade.
Hyper-Pure Silicon Offcuts
Scrap offcuts from semiconductor silicon ingot trimming, repackaged for metallurgical recovery. 2804.69.50.00 as other silicon not reworked forms.
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 and classified under 2804.69.50.00 as 'other' silicon not in pure form or for semiconductor use.
Ferrosilicon Alloying Powder
Granular ferrosilicon powder (75% Si) used in foundries for deoxidation and alloying in iron casting. Classified under 2804.69.50.00 as 'other' silicon despite iron content, as silicon is principal nonmetal per HTS structure.
Solar Grade Silicon Feedstock
Polycrystalline silicon chunks for photovoltaic cell production, purity ~99.5%. Classified in 2804.69.50.00 as 'other' silicon distinct from semiconductor pure grades.
Silicon Metal Granules 441 Grade
Standard 44% silicon, 41% iron granules for steel desulfurization. Under 2804.69.50.00 as principal nonmetal silicon despite alloy appearance.