# United States tariff lines under HS 2811.21

> The United States tariff splits HS 2811.21 (other inorganic oxygen compounds of non-metals: Carbon dioxide) into 1 national line: 2811.21.00.00 (carbon dioxide). The general (MFN) duty is 3.7% on this line.

Source: https://border.bot/countries/united-states/hs-codes/281121
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 28](https://border.bot/countries/united-states/hs-codes/28) / [2811.21](https://border.bot/countries/united-states/hs-codes/281121)

## Key facts

- HS subheading: [2811.21](https://border.bot/hs-codes/281121)
- Duty (MFN): 3.7%
- National lines: 1
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 28: Inorganic chemicals; organic or inorganic compounds of precious metals, of rare-earth metals, of radioactive elements or of isotopes

## United States lines under 2811.21

The United States tariff splits HS 2811.21 (other inorganic oxygen compounds of non-metals: Carbon dioxide) into 1 national line: 2811.21.00.00 (carbon dioxide).

The general (MFN) duty is 3.7% on this line.

- [2811.21.00.00](https://border.bot/countries/united-states/hs-codes/2811210000) Other inorganic oxygen compounds of nonmetals, Carbon dioxide. Duty (MFN): 3.7%

## In other countries

No other national tariff on border.bot has live lines under 2811.21 yet.

- [The Harmonized System text for 2811.21](https://border.bot/hs-codes/281121)

- Previous subheading: [2811.19](https://border.bot/countries/united-states/hs-codes/281119) Other
- Next subheading: [2811.22](https://border.bot/countries/united-states/hs-codes/281122) Silicon dioxide

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2811.21?

The United States tariff splits HS 2811.21 (other inorganic oxygen compounds of non-metals: Carbon dioxide) into 1 national line: 2811.21.00.00 (carbon dioxide).

### What is the duty on HS 2811.21 in the United States?

The general (MFN) duty is 3.7% on this line.

## Sources and updates

The tariff lines for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The duty rates for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

The trade programmes for the United States come from border.bot release 1 (edition 2026HTSRev21), read from the publisher’s files, and have been live since 9 October 2026.

This page was last updated on 9 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.

Official source files:

- https://hts.usitc.gov/reststop/exportList?from=0000000000&to=9999999999&format=CSV&styles=false

Machine-readable: https://border.bot/countries/united-states/hs-codes/281121.json