HTS heading 2518: Dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (

Heading 2518 of the US Harmonized Tariff Schedule covers Dolomite, whether or not calcined or sintered, including dolomite roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape. 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 2518 at a glance

• 2 rated tariff lines; 1 duty-free at the general (MFN) rate.
• Ad valorem general rates from 3% to 3%.
• Section 301 (products of China): 2 of 2 lines on a list in effect (List 3).

Goods named in this heading (official line texts): Dolomite, not calcined or sintered, Calcined or sintered dolomite.

Subheadings (6-digit)

• 2518.10: Dolomite, not calcined or sintered (1 line)
• 2518.20: Calcined or sintered dolomite (1 line)

All tariff lines in heading 2518

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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