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2825.90.30.00/Tungsten Trioxide Hydrate (Yellow Tungstic Acid)/Mexico

Tungsten Trioxide Hydrate (Yellow Tungstic Acid) from Mexico

Hydrated WO3, known as yellow tungstic acid (5WO3·H2O), used in catalyst impregnation. Falls under HTS 2825.90.30.00 as tungsten oxides; hydrates of metal oxides remain classified as oxides, not acids unless specified otherwise. Common intermediate in refining.

Duty Rate — Mexico → United States

5.5%

Rate breakdown

9903.05.860%Universal product exemption (U.S. note 52(b))
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Import Tips

• Water content declaration critical; calculate duty on anhydrous basis if required by customs

• Distinguish from tungstic acid solutions (2811.19) by solid form and hydrate status

• Hygroscopic nature requires sealed packaging; document moisture at time of packing

Tungsten Trioxide Hydrate (Yellow Tungstic Acid) from Mexico — Import Duty Rate | HTS 2825.90.30.00