# HS code 2529.21: Fluorspar, containing by weight 97 % or less of calcium fluoride

> HS code 2529.21 covers fluorspar, containing by weight 97 % or less of calcium fluoride. It sits in heading 25.29 (feldspar; leucite, nepheline and nepheline syenite; fluorspar) in chapter 25 (salt; sulphur; earths and stone; plastering materials, lime and cement). Other goods of heading 25.29 are classified under 2529.10 (feldspar), 2529.22 (fluorspar, containing by weight more than 97 % of calcium fluoride) or 2529.30 (leucite; nepheline and nepheline syenite). National tariff lines under 2529.21 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/252921
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 25](https://border.bot/hs-codes/25) / [25.29](https://border.bot/hs-codes/2529) / [2529.21](https://border.bot/hs-codes/252921)

## Key facts

- HS code: 2529.21
- Covers: Fluorspar, containing by weight 97 % or less of calcium fluoride
- Heading: [25.29: Feldspar; leucite, nepheline and nepheline syenite; fluorspar](https://border.bot/hs-codes/2529)
- Chapter: [25: Salt; sulphur; earths and stone; plastering materials, lime and cement](https://border.bot/hs-codes/25)
- Edition: HS2022
- Duty in the United States: [See its 1 line](https://border.bot/countries/united-states/hs-codes/252921)

## What this code covers

HS code 2529.21 covers fluorspar, containing by weight 97 % or less of calcium fluoride.

The legal text of the subheading is “Fluorspar: Containing by weight 97 % or less of calcium fluoride”, read under “Fluorspar”, in HS2022.

## What it doesn’t cover

Other goods of heading 25.29 are classified under 2529.10 (feldspar), 2529.22 (fluorspar, containing by weight more than 97 % of calcium fluoride) or 2529.30 (leucite; nepheline and nepheline syenite).

- [2529.10](https://border.bot/hs-codes/252910) Feldspar
- [2529.22](https://border.bot/hs-codes/252922) Fluorspar: Containing by weight more than 97 % of calcium fluoride
- [2529.30](https://border.bot/hs-codes/252930) Leucite; nepheline and nepheline syenite

## How it is structured

2529.21 is a six-digit subheading. Its first two digits, 25, are the chapter; the first four, 2529, are heading 25.29; the last two, 21, identify the subheading within the heading.

Countries add their own digits after these six for their national tariff lines.

- Chapter 25: Salt; sulphur; earths and stone; plastering materials, lime and cement
- Heading 25.29: Feldspar; leucite, nepheline and nepheline syenite; fluorspar
- Within the heading: Fluorspar
- Subheading 2529.21: Containing by weight 97 % or less of calcium fluoride

## In other countries

National tariff lines under 2529.21 are live on border.bot for the United States (1 line, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/252921): 1 line, used by 1 other country

- Previous subheading: [2529.10](https://border.bot/hs-codes/252910) Feldspar
- Next subheading: [2529.22](https://border.bot/hs-codes/252922) Fluorspar: Containing by weight more than 97 % of calcium fluoride

## Frequently asked questions

### What does HS code 2529.21 cover?

HS code 2529.21 covers fluorspar, containing by weight 97 % or less of calcium fluoride.

### Which heading and chapter is HS code 2529.21 in?

HS code 2529.21 is in heading 25.29 (feldspar; leucite, nepheline and nepheline syenite; fluorspar) in chapter 25 (salt; sulphur; earths and stone; plastering materials, lime and cement).

### Where are goods of heading 25.29 classified when 2529.21 doesn’t fit?

Other goods of heading 25.29 are classified under 2529.10 (feldspar), 2529.22 (fluorspar, containing by weight more than 97 % of calcium fluoride) or 2529.30 (leucite; nepheline and nepheline syenite).

### Which countries’ tariffs list national lines under HS code 2529.21?

National tariff lines under 2529.21 are live on border.bot for the United States (1 line, also used by 1 other country).

## Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 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.

Machine-readable: https://border.bot/hs-codes/252921.json