Calcined Kyanite Powder from Japan
Calcined kyanite is a high-alumina aluminosilicate mineral processed by heating to stabilize its crystal structure, preventing volume expansion during ceramic firing. It is classified under HTS 2508.50.00.00 as calcined kyanite, a form of sillimanite group mineral used primarily in refractory and ceramic applications.
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
• Verify mineral purity through lab analysis certificates to confirm andalusite/kyanite/sillimanite content over 50% as per Chapter 25 notes
• Include heat treatment records showing calcination process to distinguish from unprocessed minerals under heading 2512
• Avoid misclassification as synthetic mullite (HTS 2529); provide geological origin documentation