# HS code 2815.11: Sodium hydroxide (caustic soda), solid

> HS code 2815.11 covers sodium hydroxide (caustic soda), solid. It sits in heading 28.15 (sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium) 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 28.15 are classified under 2815.12 (sodium hydroxide (caustic soda), in aqueous solution (soda lye or liquid soda)), 2815.20 (potassium hydroxide (caustic potash)) or 2815.30 (peroxides of sodium or potassium).

Source: https://staging.border.bot/hs-codes/281511
Last updated: 13 October 2026

[HS codes](https://staging.border.bot/hs-codes) / [Chapter 28](https://staging.border.bot/hs-codes/28) / [28.15](https://staging.border.bot/hs-codes/2815) / [2815.11](https://staging.border.bot/hs-codes/281511)

## Key facts

- HS code: 2815.11
- Covers: Sodium hydroxide (caustic soda), solid
- Heading: [28.15: Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium](https://staging.border.bot/hs-codes/2815)
- 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 2815.11 covers sodium hydroxide (caustic soda), solid.

The legal text of the subheading is “Sodium hydroxide (caustic soda): Solid”, read under “Sodium hydroxide (caustic soda)”, in HS2022.

## What it doesn’t cover

Other goods of heading 28.15 are classified under 2815.12 (sodium hydroxide (caustic soda), in aqueous solution (soda lye or liquid soda)), 2815.20 (potassium hydroxide (caustic potash)) or 2815.30 (peroxides of sodium or potassium).

- [2815.12](https://staging.border.bot/hs-codes/281512) Sodium hydroxide (caustic soda): In aqueous solution (soda lye or liquid soda)
- [2815.20](https://staging.border.bot/hs-codes/281520) Potassium hydroxide (caustic potash)
- [2815.30](https://staging.border.bot/hs-codes/281530) Peroxides of sodium or potassium

## How it is structured

2815.11 is a six-digit subheading. Its first two digits, 28, are the chapter; the first four, 2815, are heading 28.15; the last two, 11, 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 28.15: Sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium
- Within the heading: Sodium hydroxide (caustic soda)
- Subheading 2815.11: Solid

## In other countries

No national tariff lines under 2815.11 are live on border.bot yet. Tariffs built on the Harmonized System (HS2022) use 2815.11 at six digits and add their own digits after it.

- Previous subheading: [2814.20](https://staging.border.bot/hs-codes/281420) Ammonia in aqueous solution
- Next subheading: [2815.12](https://staging.border.bot/hs-codes/281512) Sodium hydroxide (caustic soda): In aqueous solution (soda lye or liquid soda)

## Frequently asked questions

### What does HS code 2815.11 cover?

HS code 2815.11 covers sodium hydroxide (caustic soda), solid.

### Which heading and chapter is HS code 2815.11 in?

HS code 2815.11 is in heading 28.15 (sodium hydroxide (caustic soda); potassium hydroxide (caustic potash); peroxides of sodium or potassium) 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 28.15 classified when 2815.11 doesn’t fit?

Other goods of heading 28.15 are classified under 2815.12 (sodium hydroxide (caustic soda), in aqueous solution (soda lye or liquid soda)), 2815.20 (potassium hydroxide (caustic potash)) or 2815.30 (peroxides of sodium or potassium).

## 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/281511.json