Ferrous Sulfate Heptahydrate from China
Ferrous sulfate heptahydrate, also known as green vitriol, is used as a fertilizer supplement, water treatment agent, and iron source in animal feed. It qualifies under HTS 2833.29.51 as an 'other' sulfate, specifically a metal sulfate not enumerated elsewhere in heading 2833.
Duty Rate — China → United States
28.7%
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)
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide assay certificates showing iron and sulfate content to distinguish from ferrous sulfate monohydrate (2833.25)
• Label as fertilizer grade if applicable, but ensure it meets Chapter 28 purity standards to avoid Chapter 31 reclassification
• Monitor moisture content during shipping to prevent degradation and customs disputes over hydrate form