Anhydrous Magnesium Sulfate from Mexico
Anhydrous magnesium sulfate (MgSO4) is a dry, white powder used as a desiccant in labs and pharmaceuticals. Classified under HTS 2833.21.00.00 as a chemically defined sulfate of magnesium per Chapter 28 notes. It absorbs moisture without forming hydrates during standard handling.
Duty Rate — Mexico → United States
3.7%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Include drying agent test data in documentation; distinguish from hydrated forms to prevent reclassification; check for pharma-grade certifications like USP if applicable