Tungsten(VI) Oxide Granules from Mexico
Granular form of WO3 used in gas sensor manufacturing and electrochromic devices. Classified under HTS 2825.90.30.00 as it is a specific tungsten oxide meeting inorganic base oxide definitions. The granular physical form does not change its chemical classification.
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
• Provide particle size analysis to distinguish from bulk tungsten metal precursors and avoid reclassification
• Comply with REACH-like regulations for chemical imports; include extended SDS covering environmental hazards
• Declare exact CAS number (1314-35-8) on commercial invoice to facilitate verification