Calcined Witherite for Glassmaking from Japan
Specially calcined natural witherite meeting glass industry standards for barium content, used to introduce BaO into glass formulations. Covered by HTS 2511.20.00.00 as calcined witherite before full decomposition to oxide. Critical for optical and TV glass production.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Supply glass manufacturer specs and test data confirming controlled calcination endpoints
• Declare intended glass formulation use to justify valuation based on industrial mineral pricing
• Monitor for partial conversion to oxide which requires separate declaration under 2816