Tungsten Blue Oxide (W20O58) from Canada
Tungsten blue oxide, a mixed-valence WO2.9 equivalent (W20O58), used as APT reduction intermediate for tungsten carbide production. Classified in HTS 2825.90.30.00 as it qualifies as chemically defined tungsten oxides per subheading note. Widely traded form in the tungsten supply chain.
Duty Rate — Canada → 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
• Specify exact stoichiometry (W20O58) and reduction equivalent on invoice to match statistical reporting
• Monitor tungsten quota restrictions; obtain import licenses if applicable for strategic materials
• Test for moisture content as it affects weight declaration and duty calculation