# United States tariff lines under HS 2529.21

> The United States tariff splits HS 2529.21 (fluorspar: Containing by weight 97 % or less of calcium fluoride) into 1 national line: 2529.21.00.00 (containing by weight 97 percent or less of calcium fluoride). Every United States line under 2529.21 is free of general (MFN) duty.

Source: https://border.bot/countries/united-states/hs-codes/252921
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) / [2529.21](https://border.bot/countries/united-states/hs-codes/252921)

## Key facts

- HS subheading: [2529.21](https://border.bot/hs-codes/252921)
- Duty (MFN): Free
- 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 2529.21

The United States tariff splits HS 2529.21 (fluorspar: Containing by weight 97 % or less of calcium fluoride) into 1 national line: 2529.21.00.00 (containing by weight 97 percent or less of calcium fluoride).

Every United States line under 2529.21 is free of general (MFN) duty.

- [2529.21.00.00](https://border.bot/countries/united-states/hs-codes/2529210000) Fluorspar, Containing by weight 97 percent or less of calcium fluoride. Duty (MFN): free

## In other countries

No other national tariff on border.bot has live lines under 2529.21 yet.

- [The Harmonized System text for 2529.21](https://border.bot/hs-codes/252921)

- Previous subheading: [2529.10](https://border.bot/countries/united-states/hs-codes/252910) Feldspar; leucite, nepheline and nepheline syenite; fluorspar
- Next subheading: [2529.22](https://border.bot/countries/united-states/hs-codes/252922) Feldspar; leucite, nepheline and nepheline syenite; fluorspar

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2529.21?

The United States tariff splits HS 2529.21 (fluorspar: Containing by weight 97 % or less of calcium fluoride) into 1 national line: 2529.21.00.00 (containing by weight 97 percent or less of calcium fluoride).

### What is the duty on HS 2529.21 in the United States?

Every United States line under 2529.21 is free of general (MFN) duty.

## 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/252921.json