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2811.29.50.00/Sulfur Trioxide/Japan

Sulfur Trioxide from Japan

Sulfur trioxide (SO₃), used in sulfonation and as sulfuric acid dehydrating agent. As the anhydride form, it's an inorganic oxygen compound of sulfur under HTS 2811.29.5000. Supplied stabilized.

Duty Rate — Japan → United States

12.5%

Rate breakdown

9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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Import Tips

• UN 1831; corrosive liquid; stainless steel containers only

• Stabilizer content declaration prevents 2807 classification

• Moisture exclusion critical during transit

Sulfur Trioxide from Japan — Import Duty Rate | HTS 2811.29.50.00