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%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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