Ferrous Sulfate Heptahydrate Granules from Mexico
Ferrous sulfate heptahydrate (FeSO4·7H2O) granules serve as an iron supplement in water treatment and animal nutrition, under HTS 2833.29.51.90 for other sulfates. Excluded from Chapter 31 as a pure chemically defined compound.
Duty Rate — Mexico → United States
3.7%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Monitor oxidation state with fresh lot testing to prevent classification disputes
• Use anti-caking agents only if not affecting chemical purity declaration
• Provide water solubility test results for end-use verification