# United States tariff lines under HS 2518.20

> The United States tariff splits HS 2518.20 (calcined or sintered dolomite) into 1 national line: 2518.20.00.00 (calcined or sintered dolomite). The general (MFN) duty is 3% on this line.

Source: https://border.bot/countries/united-states/hs-codes/251820
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 25](https://border.bot/countries/united-states/hs-codes/25) / [2518.20](https://border.bot/countries/united-states/hs-codes/251820)

## Key facts

- HS subheading: [2518.20](https://border.bot/hs-codes/251820)
- Duty (MFN): 3%
- National lines: 1
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 25: Salt; sulphur; earths and stone; plastering materials, lime and cement

## United States lines under 2518.20

The United States tariff splits HS 2518.20 (calcined or sintered dolomite) into 1 national line: 2518.20.00.00 (calcined or sintered dolomite).

The general (MFN) duty is 3% on this line.

- [2518.20.00.00](https://border.bot/countries/united-states/hs-codes/2518200000) Calcined or sintered dolomite. Duty (MFN): 3%

## In other countries

No other national tariff on border.bot has live lines under 2518.20 yet.

- [The Harmonized System text for 2518.20](https://border.bot/hs-codes/251820)

- Previous subheading: [2518.10](https://border.bot/countries/united-states/hs-codes/251810) 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
- Next subheading: [2519.10](https://border.bot/countries/united-states/hs-codes/251910) Natural magnesium carbonate (magnesite); fused magnesia; dead-burned (sintered) magnesia, whether or not containing small quantities of other oxides added before sintering; other magnesium oxide, whether or not pure

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2518.20?

The United States tariff splits HS 2518.20 (calcined or sintered dolomite) into 1 national line: 2518.20.00.00 (calcined or sintered dolomite).

### What is the duty on HS 2518.20 in the United States?

The general (MFN) duty is 3% on this line.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/251820.json