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HSChapter 28
U.S. exports of double or complex silicates, including aluminosilicates (HS 284210) totaled $14.2M in July 2026.
Importers of Double or Complex Silicates, Including Aluminosilicates paid $1.4M in duties in July 2026 — an effective duty rate of 16% on $9.0M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: July 2026 dataDouble and complex silicates — including synthetic zeolites and aluminosilicates used as molecular sieves, detergent builders, and catalyst supports — are widely traded industrial minerals classified under a single 10-digit line (2842100000). Germany leads US import supply for this heading, reflecting that country's strength in specialty chemical and zeolite manufacturing, with China and Canada also significant sources. The heading's breadth means classification disputes can arise when distinguishing natural mineral silicates (which may fall elsewhere) from synthetic complex silicates covered here.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
210 shipments/mo
Synthetic zeolites with a defined, reproducible crystal structure and controlled Si/Al ratio are generally classified under 2842100000 as complex aluminosilicates. Natural zeolite minerals (e.g., clinoptilolite) are typically classified under Chapter 25 as mineral substances. The key evidence is the manufacturing process and product specification sheet; a synthetic origin confirmed by the supplier supports classification here.
Zeolite A (sodium aluminosilicate) replaced phosphates as a detergent builder in many formulations due to environmental regulations on phosphate discharge. Demand tracks laundry detergent production cycles and reformulation activity. Importers supplying detergent manufacturers should anticipate volume spikes tied to new product launches or phosphate regulation changes in key markets.
Subheading 2 of 2 in heading 2842
Subheading 284210 · $10.5M of $30.2M
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HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 2842100000 | Double or Complex Silicates | $10.5M | 13.26% | 85.49% | $1.4M |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2842100000 | Double or Complex Silicates, Incl Aluminosilicates | $14.2M |
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.
ImportsExports
Imports
$10.5MYoY · Pro
Exports
$14.2MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Belgium and Italy together take 61% of it.
customs district
origin
entry
rate provision · imports
14.5% enters free of duty; the effective duty rate is 13.26%.