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SITCSection 5
U.S. imports of aluminum hydroxide (SITC 52266) 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 — the primary precursor to alumina and ultimately to aluminum metal — is also a key flame retardant filler in plastics and rubber, and a raw material for aluminum chemicals used in water treatment and paper manufacturing. Its trade significance extends well beyond metallurgy: the flame-retardant and water-treatment segments each have distinct particle-size and surface-area specifications that affect pricing and classification. Importers should be aware that aluminum hydroxide destined for refractory or abrasive downstream processing may be subject to different tariff treatment than the chemical-grade material.
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No. Aluminum hydroxide (Al(OH)₃, also called alumina trihydrate or gibbsite) classifies separately from calcined alumina (aluminum oxide, Al₂O₃). The calcination step that converts hydroxide to oxide changes both the chemical identity and the applicable tariff heading, so importers must confirm the processing state of the material before filing entry.
Flame-retardant grades typically require median particle sizes in the 1–100 micron range, with surface area and oil absorption values specified by the polymer compounder. Coarser grades used in refractory cements or water treatment have looser tolerances. Specifying the grade in the purchase contract and on the commercial invoice helps prevent customs disputes over product identity.
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Monthly import values over time