Lime Production Quarry Limestone from Canada
Quarry-run limestone blocks or crushed stone from high-purity deposits, intended for quicklime production via calcination in lime kilns. Classified under HTS 2521.00.00.00 due to its specific suitability for lime manufacture, characterized by uniform reactivity and low contaminants. This feedstock is critical for industries like steel, chemicals, and water treatment.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Submit geological survey reports or quarry certificates proving the stone's lime-making suitability based on CaCO3 content
• Label shipments clearly as 'limestone for lime production' to prevent CBP reclassification as building material
• Check for moisture content declarations; wet-processed stone risks heading 2517 if not proven flux-grade