Tungsten Trioxide Powder (WO3) from Canada
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 — Canada → United States
5.5%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
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