Copper Sulfate Pentahydrate Crystals from Mexico
Blue crystalline powder known as chalcanthite, with the formula CuSO4·5H2O, used in agriculture as a fungicide and in chemistry labs. Classified under HTS 2833.25.00.00 as a sulfate of copper, meeting Chapter 28 criteria for chemically defined inorganic compounds. Excludes organo-inorganic compounds per chapter notes.
Duty Rate — Mexico → United States
1.4%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Verify purity and hydrate form via lab analysis to confirm classification as chemically defined copper sulfate under Chapter 28
• Provide Certificate of Analysis (CoA) showing copper content and absence of organic stabilizers to avoid misclassification
• Ensure packaging labels comply with EPA pesticide regulations if for agricultural use; watch for REACH-like restrictions on heavy metals