Niobium Pentoxide from Mexico
Niobium pentoxide (Nb2O5) is a white powder used in capacitors, superconductors, and optical glass. Imported under HTS 2825.90.90.00 as other metal oxides of niobium (columbium). Chemically defined per Chapter 28.
Duty Rate — Mexico → United States
3.7%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Specify 'columbium' synonym on invoices; assay confirms Nb2O5 purity
• Electronic grade requires particle size distribution reports
• Avoid confusion with ferro-niobium alloy (7202)