Calcium Carbonate

Vietnam leads US imports of calcium carbonate, followed by Canada and Japan, reflecting both natural limestone-derived and precipitated grades sourced globally. Calcium carbonate is a high-volume industrial mineral serving paper coating, plastics compounding, rubber, paints, and food/pharmaceutical applications, with grade and particle size determining end-use suitability. Importers should distinguish between ground calcium carbonate (GCC) and precipitated calcium carbonate (PCC), as processing method affects classification and pricing. The single US tariff line 2836500000 consolidates all forms, so detailed product specifications are critical for accurate entry documentation.