Witherite Ceramic Flux from Mexico
Calcined witherite prepared as fluxing agent for ceramic bodies and glazes, lowering melting temperatures. Remains HTS 2511.20.00.00 as natural barium carbonate suitable for high-temperature decomposition in firing. Used in electrical porcelain and tile production.
Duty Rate — Mexico → United States
10%
Rate breakdown
9903.05.5510%Except for products described in headings 9903.05.85–9903.05.92 and 9903.05.94, articles the product of Mexico, as provided for in U.S. note 52 to this subchapter
Import Tips
• Provide ceramic firing profile data showing witherite decomposition behavior
• Document supplier qualification for ceramics to establish trade pricing norms
• Avoid additive declarations that could trigger chemical mixture reclassification