Sodium Tungstate Dihydrate from Mexico
Sodium tungstate dihydrate (Na2WO4·2H2O) is a white crystalline salt derived from tungstic acid, classified under HTS 2841.80.00 as a tungstate of an inorganic base. It is commonly used in the production of tungsten metal, fireproofing textiles, and as a catalyst in chemical processes.
Duty Rate — Mexico → United States
5.5%
Rate breakdown
9903.05.860%Articles provided for in subdivision (b) of U.S. note 52 to this subchapter
Import Tips
• Verify purity and chemical composition via lab analysis to confirm classification as chemically defined tungstate per Chapter 28 notes
• Include Material Safety Data Sheets (MSDS) and certificates of analysis in documentation to avoid reclassification as mixtures
• Ensure proper hazardous material labeling if shipped in quantities exceeding regulatory thresholds for moisture-sensitive compounds