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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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