# United States tariff lines under HS 2836.40

> The United States tariff splits HS 2836.40 (potassium carbonates) into 2 national lines: 2836.40.10.00 (dipotassium carbonate) and 2836.40.20.00 (potassium hydrogencarbonate (Potassium bicarbonate)). The general (MFN) duty differs by line: 1.9% on 2836.40.10.00 and 1.3% on 2836.40.20.00.

Source: https://border.bot/countries/united-states/hs-codes/283640
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) / [2836.40](https://border.bot/countries/united-states/hs-codes/283640)

## Key facts

- HS subheading: [2836.40](https://border.bot/hs-codes/283640)
- National lines: 2
- 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 2836.40

The United States tariff splits HS 2836.40 (potassium carbonates) into 2 national lines: 2836.40.10.00 (dipotassium carbonate) and 2836.40.20.00 (potassium hydrogencarbonate (Potassium bicarbonate)).

The general (MFN) duty differs by line: 1.9% on 2836.40.10.00 and 1.3% on 2836.40.20.00.

- [2836.40.10.00](https://border.bot/countries/united-states/hs-codes/2836401000) Potassium carbonates, Dipotassium carbonate. Duty (MFN): 1.9%
- [2836.40.20.00](https://border.bot/countries/united-states/hs-codes/2836402000) Potassium carbonates, Potassium hydrogencarbonate (Potassium bicarbonate). Duty (MFN): 1.3%

## In other countries

No other national tariff on border.bot has live lines under 2836.40 yet.

- [The Harmonized System text for 2836.40](https://border.bot/hs-codes/283640)

- Previous subheading: [2836.30](https://border.bot/countries/united-states/hs-codes/283630) Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate
- Next subheading: [2836.50](https://border.bot/countries/united-states/hs-codes/283650) Carbonates; peroxocarbonates (percarbonates); commercial ammonium carbonate containing ammonium carbamate

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2836.40?

The United States tariff splits HS 2836.40 (potassium carbonates) into 2 national lines: 2836.40.10.00 (dipotassium carbonate) and 2836.40.20.00 (potassium hydrogencarbonate (Potassium bicarbonate)).

### What is the duty on HS 2836.40 in the United States?

The general (MFN) duty differs by line: 1.9% on 2836.40.10.00 and 1.3% on 2836.40.20.00.

## 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/283640.json