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6901.00.00.00/Kieselguhr Insulating Brick/Japan

Kieselguhr Insulating Brick from Japan

Insulating ceramic brick produced from kieselguhr (diatomite), offering excellent thermal resistance for boiler linings and high-heat applications. Classified under HTS 6901.00.00.00 due to its composition from siliceous fossil meals fired after shaping.

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

• Include lab test results showing water absorption and silica content typical of diatomaceous earth

• Ensure marking indicates 'diatomite' or 'kieselguhr' composition for customs verification

• Avoid mixing with clay products in shipments to prevent average absorption calculations affecting classification

Kieselguhr Insulating Brick from Japan — Import Duty Rate | HTS 6901.00.00.00