# United States tariff lines under HS 2923.40

> The United States tariff splits HS 2923.40 (didecyldimethylammonium perfluorooctane sulphonate) into 1 national line: 2923.40.00.00 (didecylmethylammonium perfluorooctane sulfonate). The general (MFN) duty is 6.2% on this line.

Source: https://border.bot/countries/united-states/hs-codes/292340
Last updated: 9 October 2026

[Countries](https://border.bot/countries) / [United States](https://border.bot/countries/united-states) / [Chapter 29](https://border.bot/countries/united-states/hs-codes/29) / [2923.40](https://border.bot/countries/united-states/hs-codes/292340)

## Key facts

- HS subheading: [2923.40](https://border.bot/hs-codes/292340)
- Duty (MFN): 6.2%
- National lines: 1
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 29: Organic chemicals

## United States lines under 2923.40

The United States tariff splits HS 2923.40 (didecyldimethylammonium perfluorooctane sulphonate) into 1 national line: 2923.40.00.00 (didecylmethylammonium perfluorooctane sulfonate).

The general (MFN) duty is 6.2% on this line.

- [2923.40.00.00](https://border.bot/countries/united-states/hs-codes/2923400000) Didecylmethylammonium perfluorooctane sulfonate. Duty (MFN): 6.2%

## In other countries

No other national tariff on border.bot has live lines under 2923.40 yet.

- [The Harmonized System text for 2923.40](https://border.bot/hs-codes/292340)

- Previous subheading: [2923.30](https://border.bot/countries/united-states/hs-codes/292330) Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined
- Next subheading: [2923.90](https://border.bot/countries/united-states/hs-codes/292390) Quaternary ammonium salts and hydroxides; lecithins and other phosphoaminolipids, whether or not chemically defined

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2923.40?

The United States tariff splits HS 2923.40 (didecyldimethylammonium perfluorooctane sulphonate) into 1 national line: 2923.40.00.00 (didecylmethylammonium perfluorooctane sulfonate).

### What is the duty on HS 2923.40 in the United States?

The general (MFN) duty is 6.2% 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/292340.json