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HTS heading 2521: Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement

Heading 2521 of the US Harmonized Tariff Schedule covers Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of lime or cement. Below: every rated tariff line in it with its general duty rate, Section 301 China status and exclusions, then a page per line with a free duty calculator.

Official USITC HTS, 2026HTSRev22 · check on hts.usitc.gov

Heading 2521 at a glance

Goods named in this heading (official line texts): Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of li….

Subheadings (6-digit)

All tariff lines in heading 2521

LineDescriptionGeneralSection 301 (China)Exclusions
2521.00.00Limestone flux; limestone and other calcareous stone, of a kind used for the manufacture of li…FreeList 3 +25%

All of chapter 25 · Chapter 25 rate summary · HTS lookup

General information from the official US Harmonized Tariff Schedule (USITC) and USTR Section 301 notices in HTS Chapter 99; not legal or customs advice. Classification is decided by CBP; confirm with a licensed customs broker or a CBP binding ruling.

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