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2836.50.00.00/Optical Grade Calcium Carbonate/Mexico

Optical Grade Calcium Carbonate from Mexico

High-purity, low-birefringence calcium carbonate crystals for optical polishing compounds and lens manufacturing aids, under HTS 2836.50.00.00. Synthetic single crystals available.

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 X-ray diffraction confirming calcite crystal structure

• Test for inclusions (<10 ppm) affecting optical clarity

• Package in inert atmosphere to prevent CO2 absorption/hydration

Optical Grade Calcium Carbonate from Mexico — Import Duty Rate | HTS 2836.50.00.00