2508.60.00.00/Micronized Mullite Flour/Japan

Micronized Mullite Flour from Japan

Micronized mullite flour (D50 <5μm) serves as a fine filler in technical ceramics and casting slips. Remains under HTS 2508.60.00.00 as processed mullite powder, not chemical preparations.

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%

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Import Tips

• Submit particle size distribution (laser diffraction) confirming flour specification

• Ensure no organic additives; pure mullite maintains mineral classification