U.S. imports of Silicon Dioxide (HS 281122) totaled $24.0M in August 2026, imported from 44 countries.
Importers of Silicon Dioxide paid $4.3M in duties in August 2026, an average duty rate of 18.04% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataSynthetic silica gel (2811221000) and other silicon dioxide forms (2811225000) serve distinct industrial roles — silica gel as a desiccant and chromatography medium, fumed or precipitated silica as a rubber reinforcing agent or food anti-caking agent — making correct subheading selection critical. China is the dominant supplier, with Japan and Germany also significant sources; imports from China are subject to Section 301 tariffs, a cost factor that has driven sourcing diversification toward European and Japanese producers for higher-specification grades. Buyers should verify whether the product is synthetic silica gel or another form before entry, as the two 10-digit lines carry different classification treatment.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
859 import shipments a month
Synthetic silica gel is an amorphous, porous form of SiO₂ manufactured by chemical precipitation and used primarily as a desiccant or adsorbent. Fumed silica, precipitated silica used as a reinforcing filler, and other non-gel forms generally fall under the NESOI line. The supplier's technical data sheet and production method are the key classification evidence.
Yes. Silicon dioxide originating in China is subject to Section 301 tariffs. Importers sourcing from Japan or Germany — the next leading suppliers — should evaluate whether the specification requirements and total landed cost justify the origin shift.
ImportsExports
Imports
$24.0MYoY · free account
Exports
$20.4MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $304.7M of Silicon Dioxide and exported $251.5M.
Through August 2026. Source: U.S. Census Bureau.
Subheading 1 of 6 in heading 2811
Subheading 281122 · $24.0M of $56.4M
Trade Directory
List your company under HS 281122 — Silicon Dioxide, so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2811225000 | Silicon Dioxide, NESOI | $13.3M | 10.92% | 82.68% | $1.5M |
| 2811221000 | Synthetic Silica Gel | $10.5M | 27.05% | 89.67% | $2.8M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2811220000 | Silicon Dioxide | $20.4M |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · August 2026
origin
China and Japan together supply 51% of it. China pays 37.9% duty; India 7.9%.
customs district
destination
entry
rate provision · imports
14.0% enters free of duty; duty collected equals 18.04% of imports for consumption.