# United States tariff lines under HS 2921.43

> The United States tariff splits HS 2921.43 (aromatic monoamines and their derivatives; salts thereof: Toluidines and their derivatives; salts thereof) into 10 national lines: 2921.43.04.00 (3-Chloro-o-toluidine; and 6-Chloro-o-toluidine), 2921.43.08.00 (4-Chloro-o-toluidine and hydrochloride; 5-Chloro-o-toluidine; 6-Chloro-2-toluidine-4-sulfonic acid; 4-Chloro-α,α,α-trifluoro-o- toluidine; 2,6-Dichloro-m-toluidine;N,N- Dimethyl-p-toluidine;N-Ethyl-N-benzyl-m-toluidine; andN-Ethyl-o-toluidine), 2921.43.15.00 (α,α,α-Trifluoro-2,6-dinitro-N,N-dipropyl-p- toluidine (Trifluralin)), 2921.43.19.00 (α,α,α-Trifluoro-o-toluidine; andα,α,α-Trifluoro-6-chloro-m-toluidine) and 6 others.

Source: https://border.bot/countries/united-states/hs-codes/292143
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) / [2921.43](https://border.bot/countries/united-states/hs-codes/292143)

## Key facts

- HS subheading: [2921.43](https://border.bot/hs-codes/292143)
- National lines: 10
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 29: Organic chemicals

## United States lines under 2921.43

The United States tariff splits HS 2921.43 (aromatic monoamines and their derivatives; salts thereof: Toluidines and their derivatives; salts thereof) into 10 national lines: 2921.43.04.00 (3-Chloro-o-toluidine; and 6-Chloro-o-toluidine), 2921.43.08.00 (4-Chloro-o-toluidine and hydrochloride; 5-Chloro-o-toluidine; 6-Chloro-2-toluidine-4-sulfonic acid; 4-Chloro-α,α,α-trifluoro-o- toluidine; 2,6-Dichloro-m-toluidine;N,N- Dimethyl-p-toluidine;N-Ethyl-N-benzyl-m-toluidine; andN-Ethyl-o-toluidine), 2921.43.15.00 (α,α,α-Trifluoro-2,6-dinitro-N,N-dipropyl-p- toluidine (Trifluralin)), 2921.43.19.00 (α,α,α-Trifluoro-o-toluidine; andα,α,α-Trifluoro-6-chloro-m-toluidine) and 6 others.

- [2921.43.04.00](https://border.bot/countries/united-states/hs-codes/2921430400) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, 3-Chloro-o-toluidine; and 6-Chloro-o-toluidine. Duty (MFN): free
- [2921.43.08.00](https://border.bot/countries/united-states/hs-codes/2921430800) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, 4-Chloro-o-toluidine and hydrochloride; 5-Chloro-o-toluidine; 6-Chloro-2-toluidine-4-sulfonic acid; 4-Chloro-α,α,α-trifluoro-o- toluidine; 2,6-Dichloro-m-toluidine;N,N- Dimethyl-p-toluidine;N-Ethyl-N-benzyl-m-toluidine; andN-Ethyl-o-toluidine. Duty (MFN): 5.8%
- [2921.43.15.00](https://border.bot/countries/united-states/hs-codes/2921431500) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, α,α,α-Trifluoro-2,6-dinitro-N,N-dipropyl-p- toluidine (Trifluralin). Duty (MFN): 6.5%
- [2921.43.19.00](https://border.bot/countries/united-states/hs-codes/2921431900) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, α,α,α-Trifluoro-o-toluidine; andα,α,α-Trifluoro-6-chloro-m-toluidine. Duty (MFN): 6.5%
- [2921.43.22.00](https://border.bot/countries/united-states/hs-codes/2921432200) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, N-Ethyl-N-(2-methyl-2-propenyl)-2,6- dinitro-4-(trifluoromethyl)benzenamine. Duty (MFN): 6.5%
- [2921.43.24.00](https://border.bot/countries/united-states/hs-codes/2921432400) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, 2-Amino-5-chloro-4-ethyl benzenesulfonic acid; 2-Amino-5-chloro-p-toluenesulfonic acid;p-Nitro-o-toluidine; and 3-(Trifluoromethyl) aniline (m-Aminobenzotrifluoride). Duty (MFN): free
- [2921.43.40.00](https://border.bot/countries/united-states/hs-codes/2921434000) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, Other, Products described in additional U.S. note 3 to section VI. Duty (MFN): 6.5%
- [2921.43.90.20](https://border.bot/countries/united-states/hs-codes/2921439020) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, Other, Other, 2-Chloro-p-toluidine-5-sulfonic acid (CAS No. 88-51-7). Duty (MFN): 6.5%
- [2921.43.90.40](https://border.bot/countries/united-states/hs-codes/2921439040) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, Other, Other, p-Toluidine-m-sulfonic acid (CAS No. 88-44-8). Duty (MFN): 6.5%
- [2921.43.90.90](https://border.bot/countries/united-states/hs-codes/2921439090) Aromatic monoamines and their derivatives; salts thereof, Toluidines and their derivatives; salts thereof, Other, Other, Other. Duty (MFN): 6.5%

## In other countries

No other national tariff on border.bot has live lines under 2921.43 yet.

- [The Harmonized System text for 2921.43](https://border.bot/hs-codes/292143)

- Previous subheading: [2921.42](https://border.bot/countries/united-states/hs-codes/292142) Aniline derivatives and their salts
- Next subheading: [2921.44](https://border.bot/countries/united-states/hs-codes/292144) Diphenylamine and its derivatives; salts thereof

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2921.43?

The United States tariff splits HS 2921.43 (aromatic monoamines and their derivatives; salts thereof: Toluidines and their derivatives; salts thereof) into 10 national lines: 2921.43.04.00 (3-Chloro-o-toluidine; and 6-Chloro-o-toluidine), 2921.43.08.00 (4-Chloro-o-toluidine and hydrochloride; 5-Chloro-o-toluidine; 6-Chloro-2-toluidine-4-sulfonic acid; 4-Chloro-α,α,α-trifluoro-o- toluidine; 2,6-Dichloro-m-toluidine;N,N- Dimethyl-p-toluidine;N-Ethyl-N-benzyl-m-toluidine; andN-Ethyl-o-toluidine), 2921.43.15.00 (α,α,α-Trifluoro-2,6-dinitro-N,N-dipropyl-p- toluidine (Trifluralin)), 2921.43.19.00 (α,α,α-Trifluoro-o-toluidine; andα,α,α-Trifluoro-6-chloro-m-toluidine) and 6 others.

## 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/292143.json