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HSChapter 28
U.S. imports of aluminum hydroxide (HS 281830) totaled $26.2M in April 2026, traded with 18 countries.
Importers of Aluminum Hydroxide paid $2.4M in duties in April 2026 — an effective duty rate of 11% on $21.4M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataAluminum hydroxide — also called ATH (alumite trihydrate) in industrial trade — functions as both a flame retardant filler in plastics and rubber and as the primary precursor to alumina in the Bayer refining process. Brazil and Germany are the leading US suppliers under tariff line 2818300000, with Jamaica and Canada also significant sources. The product's dual role as a chemical intermediate and a functional additive means buyers must specify purity grade and particle-size distribution carefully, as these parameters drive classification and pricing. Canada's participation in USMCA can affect duty treatment for shipments originating there.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Aluminum hydroxide (Al(OH)₃) retains chemically bound water molecules and classifies under HTS 2818.30, while aluminum oxide (Al₂O₃) is the anhydrous or calcined form under 2818.20. The distinction matters because processing conditions — particularly calcination temperature — determine which form is present, and misclassification between the two headings is a common audit finding.
The largest demand segments are flame-retardant compounding (plastics, wire and cable insulation, rubber), paper coating and filling, and water treatment chemicals. Pharmaceutical-grade aluminum hydroxide used as an antacid active ingredient is a smaller but distinct market segment with separate quality specifications.
Monthly import values over time
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HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 2818300000 | ALUMINUM HYDROXIDE | $26.2M | 11.33% | $2.4M |
ALUMINUM HYDROXIDE
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 2818300000 | ALUMINUM HYDROXIDE | $12.2M |
ALUMINUM HYDROXIDE
5.9M 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
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $5.2M | $3.6M | -$1.6M |
| Georgia | $5.5M | $2.8M | -$2.7M |
| Connecticut | $5.4M | -- | -$5.4M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SAVANNAH, GA | $3.1M | $2.7M | -$426K |
| HOUSTON, TX | $2.3M | $1.9M | -$413K |
| GRAMERCY, LA | $3.6M | -- | -$3.6M |