# HS code 2816.40: Oxides, hydroxides and peroxides, of strontium or barium

> HS code 2816.40 covers oxides, hydroxides and peroxides, of strontium or barium. It sits in heading 28.16 (hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium) 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 28.16 are classified under 2816.10 (hydroxide or peroxide of magnesium). National tariff lines under 2816.40 are live on border.bot for the United States (2 lines, also used by 1 other country).

Source: https://border.bot/hs-codes/281640
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 28](https://border.bot/hs-codes/28) / [28.16](https://border.bot/hs-codes/2816) / [2816.40](https://border.bot/hs-codes/281640)

## Key facts

- HS code: 2816.40
- Covers: Oxides, hydroxides and peroxides, of strontium or barium
- Heading: [28.16: Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium](https://border.bot/hs-codes/2816)
- 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 2 lines](https://border.bot/countries/united-states/hs-codes/281640)

## What this code covers

HS code 2816.40 covers oxides, hydroxides and peroxides, of strontium or barium.

The legal text of the subheading is “Oxides, hydroxides and peroxides, of strontium or barium”, in HS2022.

## What it doesn’t cover

Other goods of heading 28.16 are classified under 2816.10 (hydroxide or peroxide of magnesium).

- [2816.10](https://border.bot/hs-codes/281610) Hydroxide and peroxide of magnesium

## How it is structured

2816.40 is a six-digit subheading. Its first two digits, 28, are the chapter; the first four, 2816, are heading 28.16; the last two, 40, 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 28.16: Hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium
- Subheading 2816.40: Oxides, hydroxides and peroxides, of strontium or barium

## In other countries

National tariff lines under 2816.40 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/281640): 2 lines, used by 1 other country

- Previous subheading: [2816.10](https://border.bot/hs-codes/281610) Hydroxide and peroxide of magnesium
- Next subheading: [2817.00](https://border.bot/hs-codes/281700) Zinc oxide; zinc peroxide

## Frequently asked questions

### What does HS code 2816.40 cover?

HS code 2816.40 covers oxides, hydroxides and peroxides, of strontium or barium.

### Which heading and chapter is HS code 2816.40 in?

HS code 2816.40 is in heading 28.16 (hydroxide and peroxide of magnesium; oxides, hydroxides and peroxides, of strontium or barium) 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 28.16 classified when 2816.40 doesn’t fit?

Other goods of heading 28.16 are classified under 2816.10 (hydroxide or peroxide of magnesium).

### Which countries’ tariffs list national lines under HS code 2816.40?

National tariff lines under 2816.40 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/281640.json