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2521.00.00.00/Glass Manufacturing Calcareous Stone/Canada

Glass Manufacturing Calcareous Stone from Canada

Calcareous stone flux for soda-lime glass production, providing network stabilization. Though glass-making, classified under HTS 2521.00.00.00 as limestone used for lime manufacture (soda-lime process). Specific silica-calcia ratios required.

Duty Rate — Canada → United States

10%

Rate breakdown

9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
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Import Tips

• Glass producer specs must reference limestone flux role

• Distinguish from silica sand (2505)

Glass Manufacturing Calcareous Stone from Canada — Import Duty Rate | HTS 2521.00.00.00