Ferrous Sulfate Heptahydrate from Japan
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 — Japan → 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 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