Anhydrite Mineral from Mexico
Natural anhydrite (calcium sulfate without water of crystallization) mined as a rock or powder. Directly covered by HTS 2520.10.00.00 alongside gypsum, used in cement production and as a drying agent. Distinguished from gypsum by lower water content.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Chemical assay reports mandatory to confirm anhydrous CaSO4 composition versus hydrated gypsum
• Declare exact water content (<1.5%) to support anhydrite classification over gypsum
• Bulk shipping in ventilated containers to manage any residual moisture absorption