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HSChapter 28
U.S. imports of silicon (99.99% or greater purity) (HS 280461) totaled $6.1M in April 2026, traded with 12 countries.
Last updated: April 2026 dataHigh-purity silicon containing at least 99.99% silicon by weight — classified under 2804610000 — is the foundational material for semiconductor wafers, solar cells, and advanced electronics, distinguishing it sharply from lower-grade metallurgical silicon. Malaysia and Germany are the leading US import sources under this heading, with Taiwan and Japan also significant, reflecting the concentration of semiconductor-grade silicon production in East and Southeast Asia and Europe. Because this grade sits at the intersection of semiconductor supply chains and solar energy manufacturing, it is closely watched for trade-remedy and export-control developments. Buyers should verify certificate-of-analysis purity data, as a shipment falling below the 99.99% threshold reclassifies to heading 280469.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
The dividing line is 99.99% silicon content by weight. Silicon at or above that threshold falls under 280461 (2804610000); silicon below 99.99% — whether between 99% and 99.99% or below 99% — is classified under heading 280469. A certificate of analysis confirming purity is essential documentation at entry.
Malaysia hosts major downstream semiconductor and solar wafer manufacturing facilities that generate high-purity silicon as both a product and a by-product, while Germany is home to established specialty chemical and polysilicon producers serving European and global electronics supply chains. Both countries have invested heavily in the refining infrastructure needed to reach the 99.99% threshold.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2804610000 | SILICON CONTAIN BY WT NT LT 99.99% OF SILICON | $6.1M | 52.79% | $15K |
SILICON CONTAIN BY WT NT LT 99.99% OF SILICON
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2804610000 | SILICON CONTAIN BY WT NT LT 99.99% OF SILICON | $74.8M |
SILICON CONTAIN BY WT NT LT 99.99% OF SILICON
2.2M kg
URANIUM ENRICHED IN U235 ETC. PLUTONIUM ETC.
HS 284420
NATURAL URANIUM & COMPOUNDS, ALLOYS & CERAMICS ETC
HS 284410
ANHYDROUS AMMONIA
HS 281410
ALLOYS, DISPERSIONS,ISOTOPES & COMPOUNDS NES
HS 284443
SILICON, UNDER 99.99% (BY WEIGHT) SILICON
HS 280469
PHOSPHORIC ACID AND POLYPHOSPHORIC ACIDS
HS 280920
| Port | Imports | Exports | Balance |
|---|---|---|---|
| NORFOLK-NEWPORT NEWS, VA | -- | $43.4M | +$43.4M |
| MOBILE, AL | -- | $8.8M | +$8.8M |
| NEW YORK, NY | -- | $8.4M | +$8.4M |