Calcium Tungstate Luminescent Powder from Japan
Fine calcium tungstate powder activated for blue luminescence in cathode ray tubes and lighting phosphors. Falls under HTS 2841.80.0020 as a chemically defined tungstate of calcium per Chapter 28 notes. Used in legacy display technologies and specialty lighting.
Duty Rate — Japan → United States
5.5%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Document activator levels to maintain pure compound status; avoid retail packaging that triggers 3824
• Ensure particle size specs match technical data sheets for customs verification