# 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).

Source: https://staging.border.bot/hs-codes/281640
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 28](https://staging.border.bot/hs-codes/28) / [28.16](https://staging.border.bot/hs-codes/2816) / [2816.40](https://staging.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://staging.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://staging.border.bot/hs-codes/28)
- Edition: HS2022
- Duty rates: [Set by each country’s tariff](https://staging.border.bot/countries)

## 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://staging.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

No national tariff lines under 2816.40 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 2816.40 at six digits and add their own digits after it.

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

## Sources and updates

The Harmonized System legal text comes from border.bot release 1 (edition HS 2022), imported from a file, and has been live since 13 October 2026.

This page was last updated on 13 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://staging.border.bot/hs-codes/281640.json