Calcium Sulfite Hemihydrate from China
Calcium sulfite hemihydrate (CaSO3·0.5H2O), a white powder byproduct from flue gas desulfurization, used in construction materials. Falls under HTS 2832.20.00.00 as an 'other sulfite' chemically defined per Chapter 28 Note 1.
Duty Rate — China → United States
40.6%
Rate breakdown
9903.88.0325%Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
9903.05.3112.5%Section 301 (forced labor) — additional 12.5% ad valorem on products of China
Import Tips
• Document hydrate water content; anhydrous form may classify differently if proven
• Comply with CPSC standards if used in building products; labeling required
• Bulk shipments need dust suppression measures; improper handling causes customs holds