# United States tariff line 2508.40.01.10: Common blue clay and other ball clays

> In the United States tariff, line 2508.40.01.10 covers other clays, common blue clay and other ball clays. Goods under this line enter free of general (MFN) duty. It falls under HS subheading 2508.40 in heading 25.08 (chapter 25).

Source: https://border.bot/countries/united-states/hs-codes/2508400110
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) / [2508.40](https://border.bot/countries/united-states/hs-codes/250840) / [2508.40.01.10](https://border.bot/countries/united-states/hs-codes/2508400110)

## Key facts

- Tariff line: 2508.40.01.10
- Covers: Other clays, common blue clay and other ball clays
- Duty (MFN): Free
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [2508.40](https://border.bot/hs-codes/250840)

## What this line covers

In the United States tariff, line 2508.40.01.10 covers other clays, common blue clay and other ball clays.

Its legal text is “Common blue clay and other ball clays”, read under “Other clays”.

## How it is structured

It falls under HS subheading 2508.40 in heading 25.08 (chapter 25). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 25: Salt; sulphur; earths and stone; plastering materials, lime and cement
- Heading 25.08: Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths
- Subheading 2508.40: Other clays
- Line 2508.40.01.10: Common blue clay and other ball clays

## Duty

Goods under this line enter free of general (MFN) duty.

The rate is published on 2508.40.01.

## In other countries

No other national tariff on border.bot has live lines under 2508.40 yet.

- [The Harmonized System text for 2508.40](https://border.bot/hs-codes/250840)

## Other lines under 2508.40

- [2508.40.01.20](https://border.bot/countries/united-states/hs-codes/2508400120) Decolorizing earths and fuller's earth
- [2508.40.01.50](https://border.bot/countries/united-states/hs-codes/2508400150) Other

- Previous line: [2508.30.00.00](https://border.bot/countries/united-states/hs-codes/2508300000) Fire-clay
- Next line: [2508.40.01.20](https://border.bot/countries/united-states/hs-codes/2508400120) Decolorizing earths and fuller's earth

## Frequently asked questions

### What does tariff line 2508.40.01.10 cover in the United States tariff?

In the United States tariff, line 2508.40.01.10 covers other clays, common blue clay and other ball clays.

### What is the general (MFN) duty on 2508.40.01.10 in the United States?

Goods under this line enter free of general (MFN) duty. The rate is published on 2508.40.01.

## 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/2508400110.json