# HS code 2818.10: Artificial corundum, whether or not chemically defined

> HS code 2818.10 covers artificial corundum, whether or not chemically defined. It sits in heading 28.18 (artificial corundum, whether or not chemically defined; aluminium oxide; aluminium hydroxide) in chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes). Other goods of heading 28.18 are classified under 2818.20 (aluminium oxide, other than artificial corundum) or 2818.30 (aluminium hydroxide). National tariff lines under 2818.10 are live on border.bot for the United States (3 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/281810
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 28](https://border.bot/hs-codes/28) / [28.18](https://border.bot/hs-codes/2818) / [2818.10](https://border.bot/hs-codes/281810)

## Key facts

- HS code: 2818.10
- Covers: Artificial corundum, whether or not chemically defined
- Heading: [28.18: Artificial corundum, whether or not chemically defined; aluminium oxide; aluminium hydroxide](https://border.bot/hs-codes/2818)
- Chapter: [28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes](https://border.bot/hs-codes/28)
- Edition: HS2022
- Duty in the United States: [See its 3 lines](https://border.bot/countries/united-states/hs-codes/281810)

## What this code covers

HS code 2818.10 covers artificial corundum, whether or not chemically defined.

The legal text of the subheading is “Artificial corundum, whether or not chemically defined”, in HS2022.

## What it doesn’t cover

Other goods of heading 28.18 are classified under 2818.20 (aluminium oxide, other than artificial corundum) or 2818.30 (aluminium hydroxide).

- [2818.20](https://border.bot/hs-codes/281820) Aluminium oxide, other than artificial corundum
- [2818.30](https://border.bot/hs-codes/281830) Aluminium hydroxide

## How it is structured

2818.10 is a six-digit subheading. Its first two digits, 28, are the chapter; the first four, 2818, are heading 28.18; the last two, 10, identify the subheading within the heading.

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

- Chapter 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes
- Heading 28.18: Artificial corundum, whether or not chemically defined; aluminium oxide; aluminium hydroxide
- Subheading 2818.10: Artificial corundum, whether or not chemically defined

## In other countries

National tariff lines under 2818.10 are live on border.bot for the United States (3 lines, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/281810): 3 lines, used by 1 other country

- Previous subheading: [2817.00](https://border.bot/hs-codes/281700) Zinc oxide; zinc peroxide
- Next subheading: [2818.20](https://border.bot/hs-codes/281820) Aluminium oxide, other than artificial corundum

## Frequently asked questions

### What does HS code 2818.10 cover?

HS code 2818.10 covers artificial corundum, whether or not chemically defined.

### Which heading and chapter is HS code 2818.10 in?

HS code 2818.10 is in heading 28.18 (artificial corundum, whether or not chemically defined; aluminium oxide; aluminium hydroxide) in chapter 28 (inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes).

### Where are goods of heading 28.18 classified when 2818.10 doesn’t fit?

Other goods of heading 28.18 are classified under 2818.20 (aluminium oxide, other than artificial corundum) or 2818.30 (aluminium hydroxide).

### Which countries’ tariffs list national lines under HS code 2818.10?

National tariff lines under 2818.10 are live on border.bot for the United States (3 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/281810.json