Tungsten Trioxide Powder (WO3) from Mexico
Tungsten trioxide (WO3) is a yellow-green powder used primarily in the production of tungsten metal and as a catalyst in chemical processes. It falls under HTS 2825.90.30.00 as a chemically defined tungsten oxide, distinct from other metal oxides. This pure inorganic compound meets Chapter 28 criteria for classification as a metal oxide.
Duty Rate — Mexico → United States
5.5%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Verify purity and chemical composition via certificate of analysis to confirm classification as chemically defined under Chapter 28 notes
• Ensure proper labeling as 'Tungsten Trioxide' and include safety data sheets for hazardous material handling during customs clearance
• Avoid misclassification as tungsten metal powder (8101.94); provide documentation proving it's an oxide form