Zinc Sulfate Heptahydrate Crystals from Canada
Zinc sulfate heptahydrate (ZnSO4·7H2O) is a colorless crystalline sulfate salt used in fertilizers and animal feed supplements, classified under HTS 2833.29.51.90 as an 'other' sulfate. Its chemical definition as a metal sulfate places it distinctly in Chapter 28.
Duty Rate — Canada → United States
3.7%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Provide assay reports showing minimum 21% Zn content to meet feed-grade standards and support classification
• Include phytosanitary certificates if destined for agricultural use to comply with USDA import regulations
• Declare exact hydrate form (heptahydrate) on entry to distinguish from monohydrate variants