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2811.29.50.00/Sulfur Trioxide/Canada

Sulfur Trioxide from Canada

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 — Canada → United States

13.7%

Rate breakdown

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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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 Canada — Import Duty Rate | HTS 2811.29.50.00