# HS code 2509.00: Chalk

> HS code 2509.00 covers chalk. It sits in heading 25.09 (chalk) in chapter 25 (salt; sulphur; earths and stone; plastering materials, lime and cement). It is the only subheading of heading 25.09, so every good of the heading is classified here. National tariff lines under 2509.00 are live on border.bot for the United States (2 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/250900
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 25](https://border.bot/hs-codes/25) / [25.09](https://border.bot/hs-codes/2509) / [2509.00](https://border.bot/hs-codes/250900)

## Key facts

- HS code: 2509.00
- Covers: Chalk
- Heading: [25.09: Chalk](https://border.bot/hs-codes/2509)
- 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 2 lines](https://border.bot/countries/united-states/hs-codes/250900)

## What this code covers

HS code 2509.00 covers chalk.

The legal text of the subheading is “Chalk”, in HS2022.

## What it doesn’t cover

It is the only subheading of heading 25.09, so every good of the heading is classified here.

## How it is structured

2509.00 is a six-digit subheading. Its first two digits, 25, are the chapter; the first four, 2509, are heading 25.09; the last two, 00, 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 25.09: Chalk
- Subheading 2509.00: Chalk

## In other countries

National tariff lines under 2509.00 are live on border.bot for the United States (2 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/250900): 2 lines, used by 1 other country

- Previous subheading: [2508.70](https://border.bot/hs-codes/250870) Chamotte or dinas earths
- Next subheading: [2510.10](https://border.bot/hs-codes/251010) Unground

## Frequently asked questions

### What does HS code 2509.00 cover?

HS code 2509.00 covers chalk.

### Which heading and chapter is HS code 2509.00 in?

HS code 2509.00 is in heading 25.09 (chalk) in chapter 25 (salt; sulphur; earths and stone; plastering materials, lime and cement).

### Where are goods of heading 25.09 classified when 2509.00 doesn’t fit?

2509.00 is the only subheading of heading 25.09, so every good of the heading is classified there.

### Which countries’ tariffs list national lines under HS code 2509.00?

National tariff lines under 2509.00 are live on border.bot for the United States (2 lines, 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/250900.json