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2508.70.00.00/Mullite-Forming Chamotte Grogs/Mexico

Mullite-Forming Chamotte Grogs from Mexico

Chamotte grogs engineered to form mullite crystals upon firing, used in advanced refractories for petrochemical heaters. Classified under HTS 2508.70.00.00 as chamotte earths, these calcined clays remain unfinished raw materials. Their high purity supports consistent mullite development in end products.

Duty Rate — Mexico → United States

10%

Rate breakdown

9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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Import Tips

• Provide XRD analysis showing mullite precursors; declare as 'calcined clay grog' explicitly; ensure no pre-firing to mullite phase to stay in 2508

Mullite-Forming Chamotte Grogs from Mexico — Import Duty Rate | HTS 2508.70.00.00