HTS 2521
Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement
Chapter 25
Current Duty Rates
Source: USITC Harmonized Tariff Schedule — Last updated April 8, 2026
Rates reflect current base duties plus applicable surcharges. Section 301 rates apply to China-origin goods. Verify with your customs broker for your specific classification.
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Recent Changes
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Frequently Asked
What is HTS 2521?
HTS 2521 covers limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement. It falls under Chapter 25 of the Harmonized Tariff Schedule of the United States.
What is the duty rate for HTS 2521?
The base (MFN) duty rate for HTS 2521 is .
Are there any exclusions for HTS 2521?
Exclusions may apply depending on active Section 301 or Section 232 exclusion lists. Check the USTR exclusion portal or use TariffDesk to monitor this code for changes, including new exclusions.
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