Calcined Ground Witherite for Ceramics from China
Lightly calcined and ground natural witherite providing barium source for ceramic glazes and frits. Remains under HTS 2511.10.10.00 as long as not converted to barium oxide.
Duty Rate — China → United States
0%
Rate breakdown
9903.05.860%Universal product exemption (U.S. note 52(b))
Import Tips
• Lab reports must confirm carbonate remains dominant phase post-calcination
• Declare calcination temperature (<800°C) to prove incomplete decomposition