# United States tariff lines under HS 2924.21

> The United States tariff splits HS 2924.21 (cyclic amides (including cyclic carbamates) and their derivatives; salts thereof: Ureines and their derivatives; salts thereof) into 8 national lines: 2924.21.04.00 (3-(p-Chlorophenyl)-1,1-dimethylurea (Monuron)), 2924.21.08.00 (1,1-Dimethyl-3-(α,α,α-trifluoro-m- tolyl)urea (Fluometuron)), 2924.21.12.00 (1-(2-Methylcyclohexyl)-3-phenylurea), 2924.21.16.00 (other) and 4 others. The general (MFN) duty differs by line: 6.5% on 2924.21.04.00, free on 2924.21.08.00, free on 2924.21.12.00, 6.5% on 2924.21.16.00, 6.5% on 2924.21.18.00, 6.5% on 2924.21.20.00, 6.5% on 2924.21.45.00 and 6.5% on 2924.21.50.00.

Source: https://border.bot/countries/united-states/hs-codes/292421
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) / [2924.21](https://border.bot/countries/united-states/hs-codes/292421)

## Key facts

- HS subheading: [2924.21](https://border.bot/hs-codes/292421)
- National lines: 8
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 29: Organic chemicals

## United States lines under 2924.21

The United States tariff splits HS 2924.21 (cyclic amides (including cyclic carbamates) and their derivatives; salts thereof: Ureines and their derivatives; salts thereof) into 8 national lines: 2924.21.04.00 (3-(p-Chlorophenyl)-1,1-dimethylurea (Monuron)), 2924.21.08.00 (1,1-Dimethyl-3-(α,α,α-trifluoro-m- tolyl)urea (Fluometuron)), 2924.21.12.00 (1-(2-Methylcyclohexyl)-3-phenylurea), 2924.21.16.00 (other) and 4 others.

The general (MFN) duty differs by line: 6.5% on 2924.21.04.00, free on 2924.21.08.00, free on 2924.21.12.00, 6.5% on 2924.21.16.00, 6.5% on 2924.21.18.00, 6.5% on 2924.21.20.00, 6.5% on 2924.21.45.00 and 6.5% on 2924.21.50.00.

- [2924.21.04.00](https://border.bot/countries/united-states/hs-codes/2924210400) Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof, Ureines and their derivatives; salts thereof, Aromatic, Pesticides, 3-(p-Chlorophenyl)-1,1-dimethylurea (Monuron). Duty (MFN): 6.5%
- [2924.21.08.00](https://border.bot/countries/united-states/hs-codes/2924210800) Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof, Ureines and their derivatives; salts thereof, Aromatic, Pesticides, 1,1-Dimethyl-3-(α,α,α-trifluoro-m- tolyl)urea (Fluometuron). Duty (MFN): free
- [2924.21.12.00](https://border.bot/countries/united-states/hs-codes/2924211200) Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof, Ureines and their derivatives; salts thereof, Aromatic, Pesticides, 1-(2-Methylcyclohexyl)-3-phenylurea. Duty (MFN): free
- [2924.21.16.00](https://border.bot/countries/united-states/hs-codes/2924211600) Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof, Ureines and their derivatives; salts thereof, Aromatic, Pesticides, Other. Duty (MFN): 6.5%
- [2924.21.18.00](https://border.bot/countries/united-states/hs-codes/2924211800) Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof, Ureines and their derivatives; salts thereof, Aromatic, Other, sym-Diethyldiphenylurea. Duty (MFN): 6.5%
- [2924.21.20.00](https://border.bot/countries/united-states/hs-codes/2924212000) Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof, Ureines and their derivatives; salts thereof, Aromatic, Other, Other, Products described in additional U.S. note 3 to section VI. Duty (MFN): 6.5%
- [2924.21.45.00](https://border.bot/countries/united-states/hs-codes/2924214500) Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof, Ureines and their derivatives; salts thereof, Aromatic, Other, Other, Other. Duty (MFN): 6.5%
- [2924.21.50.00](https://border.bot/countries/united-states/hs-codes/2924215000) Cyclic amides (including cyclic carbamates) and their derivatives; salts thereof, Ureines and their derivatives; salts thereof, Other. Duty (MFN): 6.5%

## In other countries

No other national tariff on border.bot has live lines under 2924.21 yet.

- [The Harmonized System text for 2924.21](https://border.bot/hs-codes/292421)

- Previous subheading: [2924.19](https://border.bot/countries/united-states/hs-codes/292419) Other
- Next subheading: [2924.23](https://border.bot/countries/united-states/hs-codes/292423) 2-Acetamidobenzoic acid (N-acetylanthranilic acid) and its salts

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2924.21?

The United States tariff splits HS 2924.21 (cyclic amides (including cyclic carbamates) and their derivatives; salts thereof: Ureines and their derivatives; salts thereof) into 8 national lines: 2924.21.04.00 (3-(p-Chlorophenyl)-1,1-dimethylurea (Monuron)), 2924.21.08.00 (1,1-Dimethyl-3-(α,α,α-trifluoro-m- tolyl)urea (Fluometuron)), 2924.21.12.00 (1-(2-Methylcyclohexyl)-3-phenylurea), 2924.21.16.00 (other) and 4 others.

### What is the duty on HS 2924.21 in the United States?

The general (MFN) duty differs by line: 6.5% on 2924.21.04.00, free on 2924.21.08.00, free on 2924.21.12.00, 6.5% on 2924.21.16.00, 6.5% on 2924.21.18.00, 6.5% on 2924.21.20.00, 6.5% on 2924.21.45.00 and 6.5% on 2924.21.50.00.

## 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/292421.json