# HS code 2811.11: Other inorganic acids, hydrogen fluoride (hydrofluoric acid)

> HS code 2811.11 covers other inorganic acids, hydrogen fluoride (hydrofluoric acid). It sits in heading 28.11 (other inorganic acids and other inorganic oxygen compounds of non-metals) 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 28.11 are classified under 2811.12 (other inorganic acids, hydrogen cyanide (hydrocyanic acid)), 2811.19 (other inorganic acids, other), 2811.21 (other inorganic oxygen compounds of non-metals, carbon dioxide), 2811.22 (other inorganic oxygen compounds of non-metals, silicon dioxide) or 1 other. National tariff lines under 2811.11 are live on border.bot for the United States (1 line, also used by 1 other country).

Source: https://border.bot/hs-codes/281111
Last updated: 11 October 2026

[HS codes](https://border.bot/hs-codes) / [Chapter 28](https://border.bot/hs-codes/28) / [28.11](https://border.bot/hs-codes/2811) / [2811.11](https://border.bot/hs-codes/281111)

## Key facts

- HS code: 2811.11
- Covers: Other inorganic acids, hydrogen fluoride (hydrofluoric acid)
- Heading: [28.11: Other inorganic acids and other inorganic oxygen compounds of non-metals](https://border.bot/hs-codes/2811)
- 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 1 line](https://border.bot/countries/united-states/hs-codes/281111)

## What this code covers

HS code 2811.11 covers other inorganic acids, hydrogen fluoride (hydrofluoric acid).

The legal text of the subheading is “Other inorganic acids: Hydrogen fluoride (hydrofluoric acid)”, read under “Other inorganic acids”, in HS2022.

## What it doesn’t cover

Other goods of heading 28.11 are classified under 2811.12 (other inorganic acids, hydrogen cyanide (hydrocyanic acid)), 2811.19 (other inorganic acids, other), 2811.21 (other inorganic oxygen compounds of non-metals, carbon dioxide), 2811.22 (other inorganic oxygen compounds of non-metals, silicon dioxide) or 1 other.

- [2811.12](https://border.bot/hs-codes/281112) Other inorganic acids: Hydrogen cyanide (hydrocyanic acid)
- [2811.19](https://border.bot/hs-codes/281119) Other inorganic acids: Other
- [2811.21](https://border.bot/hs-codes/281121) Other inorganic oxygen compounds of non-metals: Carbon dioxide
- [2811.22](https://border.bot/hs-codes/281122) Other inorganic oxygen compounds of non-metals: Silicon dioxide
- [2811.29](https://border.bot/hs-codes/281129) Other inorganic oxygen compounds of non-metals: Other

## How it is structured

2811.11 is a six-digit subheading. Its first two digits, 28, are the chapter; the first four, 2811, are heading 28.11; 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 28.11: Other inorganic acids and other inorganic oxygen compounds of non-metals
- Within the heading: Other inorganic acids
- Subheading 2811.11: Hydrogen fluoride (hydrofluoric acid)

## In other countries

National tariff lines under 2811.11 are live on border.bot for the United States (1 line, also used by 1 other country).

- [United States](https://border.bot/countries/united-states/hs-codes/281111): 1 line, used by 1 other country

- Previous subheading: [2810.00](https://border.bot/hs-codes/281000) Oxides of boron; boric acids
- Next subheading: [2811.12](https://border.bot/hs-codes/281112) Other inorganic acids: Hydrogen cyanide (hydrocyanic acid)

## Frequently asked questions

### What does HS code 2811.11 cover?

HS code 2811.11 covers other inorganic acids, hydrogen fluoride (hydrofluoric acid).

### Which heading and chapter is HS code 2811.11 in?

HS code 2811.11 is in heading 28.11 (other inorganic acids and other inorganic oxygen compounds of non-metals) 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 28.11 classified when 2811.11 doesn’t fit?

Other goods of heading 28.11 are classified under 2811.12 (other inorganic acids, hydrogen cyanide (hydrocyanic acid)), 2811.19 (other inorganic acids, other), 2811.21 (other inorganic oxygen compounds of non-metals, carbon dioxide), 2811.22 (other inorganic oxygen compounds of non-metals, silicon dioxide) or 1 other.

### Which countries’ tariffs list national lines under HS code 2811.11?

National tariff lines under 2811.11 are live on border.bot for the United States (1 line, 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/281111.json