# United States tariff lines under HS 2934.99

> The United States tariff splits HS 2934.99 (other: Other) into 22 national lines: 2934.99.01.00 (mycophenolate mofetil), 2934.99.03.00 (2-Acetylbenzo(b)thiophene; 3-Methylene-7-(2-phenoxyacetamido)- cephan-4-carboxylic acid, p-nitrobenzyl ester, 1-oxide; and Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid and its sodium salt), 2934.99.05.00 (5-Amino-3-phenyl-1,2,4-thiadiazole (3-Phenyl-5-amino-1,2,4-thiadiazole); 2-Hydroxybenzoxazole (Benzoxazolone); 4-Phenylmorpholine; 1,9-Thianthrenedicarboxylic acid; and Thioxanthene-9-one (Thioxanthone)), 2934.99.06.00 (7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts) and 18 others.

Source: https://border.bot/countries/united-states/hs-codes/293499
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) / [2934.99](https://border.bot/countries/united-states/hs-codes/293499)

## Key facts

- HS subheading: [2934.99](https://border.bot/hs-codes/293499)
- National lines: 22
- Tariff: [United States](https://border.bot/countries/united-states)
- Chapter: 29: Organic chemicals

## United States lines under 2934.99

The United States tariff splits HS 2934.99 (other: Other) into 22 national lines: 2934.99.01.00 (mycophenolate mofetil), 2934.99.03.00 (2-Acetylbenzo(b)thiophene; 3-Methylene-7-(2-phenoxyacetamido)- cephan-4-carboxylic acid, p-nitrobenzyl ester, 1-oxide; and Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid and its sodium salt), 2934.99.05.00 (5-Amino-3-phenyl-1,2,4-thiadiazole (3-Phenyl-5-amino-1,2,4-thiadiazole); 2-Hydroxybenzoxazole (Benzoxazolone); 4-Phenylmorpholine; 1,9-Thianthrenedicarboxylic acid; and Thioxanthene-9-one (Thioxanthone)), 2934.99.06.00 (7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts) and 18 others.

- [2934.99.01.00](https://border.bot/countries/united-states/hs-codes/2934990100) Other, Other, Aromatic or modified aromatic, Mycophenolate mofetil. Duty (MFN): free
- [2934.99.03.00](https://border.bot/countries/united-states/hs-codes/2934990300) Other, Other, Aromatic or modified aromatic, 2-Acetylbenzo(b)thiophene; 3-Methylene-7-(2-phenoxyacetamido)- cephan-4-carboxylic acid, p-nitrobenzyl ester, 1-oxide; and Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid and its sodium salt. Duty (MFN): free
- [2934.99.05.00](https://border.bot/countries/united-states/hs-codes/2934990500) Other, Other, Aromatic or modified aromatic, 5-Amino-3-phenyl-1,2,4-thiadiazole (3-Phenyl-5-amino-1,2,4-thiadiazole); 2-Hydroxybenzoxazole (Benzoxazolone); 4-Phenylmorpholine; 1,9-Thianthrenedicarboxylic acid; and Thioxanthene-9-one (Thioxanthone). Duty (MFN): 5.8%
- [2934.99.06.00](https://border.bot/countries/united-states/hs-codes/2934990600) Other, Other, Aromatic or modified aromatic, 7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts. Duty (MFN): 6.5%
- [2934.99.07.00](https://border.bot/countries/united-states/hs-codes/2934990700) Other, Other, Aromatic or modified aromatic, Ethyl 2-[4-[(6-chloro-2-benzoxazolyl)oxy]- phenoxy]propanoate (Fenoxaprop-ethyl). Duty (MFN): free
- [2934.99.08.00](https://border.bot/countries/united-states/hs-codes/2934990800) Other, Other, Aromatic or modified aromatic, 2,5-Diphenyloxazole. Duty (MFN): 6.5%
- [2934.99.09.00](https://border.bot/countries/united-states/hs-codes/2934990900) Other, Other, Aromatic or modified aromatic, 1,2-Benzisothiazolin-3-one. Duty (MFN): free
- [2934.99.11.00](https://border.bot/countries/united-states/hs-codes/2934991100) Other, Other, Aromatic or modified aromatic, Other, Pesticides, 2-tert-Butyl-4-(2,4-dichloro-5- isopropoxyphenyl)-Δ²-1,3,4- oxadiazolin-5-one; 3-Isopropyl-1H-2,1,3- benzothiadiazin-4-(3H)-one-2,2- dioxide (Bentazon); andO,O-Diethyl-S-[(6-chloro-2- oxobenzoxazolin-3-yl)methyl]- phosphorodithioate (Phosalone). Duty (MFN): 6.5%
- [2934.99.12.00](https://border.bot/countries/united-states/hs-codes/2934991200) Other, Other, Aromatic or modified aromatic, Other, Pesticides, Other, Fungicides. Duty (MFN): 6.5%
- [2934.99.15.00](https://border.bot/countries/united-states/hs-codes/2934991500) Other, Other, Aromatic or modified aromatic, Other, Pesticides, Other, Herbicides. Duty (MFN): 6.5%
- [2934.99.16.00](https://border.bot/countries/united-states/hs-codes/2934991600) Other, Other, Aromatic or modified aromatic, Other, Pesticides, Other, Insecticides. Duty (MFN): 6.5%
- [2934.99.18.00](https://border.bot/countries/united-states/hs-codes/2934991800) Other, Other, Aromatic or modified aromatic, Other, Pesticides, Other, Other. Duty (MFN): 6.5%
- [2934.99.20.00](https://border.bot/countries/united-states/hs-codes/2934992000) Other, Other, Aromatic or modified aromatic, Other, Photographic chemicals. Duty (MFN): 6.5%
- [2934.99.30.00](https://border.bot/countries/united-states/hs-codes/2934993000) Other, Other, Aromatic or modified aromatic, Other, Drugs. Duty (MFN): 6.5%
- [2934.99.39.00](https://border.bot/countries/united-states/hs-codes/2934993900) Other, Other, Aromatic or modified aromatic, Other, Other, Products described in additional U.S. note 3 to section VI. Duty (MFN): 6.5%
- [2934.99.44.00](https://border.bot/countries/united-states/hs-codes/2934994400) Other, Other, Aromatic or modified aromatic, Other, Other, Other. Duty (MFN): 6.5%
- [2934.99.47.20](https://border.bot/countries/united-states/hs-codes/2934994720) Other, Other, Other, Drugs, Rocuronium (INN) and its salts. Duty (MFN): 3.7%
- [2934.99.47.30](https://border.bot/countries/united-states/hs-codes/2934994730) Other, Other, Other, Drugs, Tacrolimus (INN) and its salts. Duty (MFN): 3.7%
- [2934.99.47.40](https://border.bot/countries/united-states/hs-codes/2934994740) Other, Other, Other, Drugs, Timolol maleate and its salts. Duty (MFN): 3.7%
- [2934.99.47.90](https://border.bot/countries/united-states/hs-codes/2934994790) Other, Other, Other, Drugs, Other. Duty (MFN): 3.7%
- [2934.99.70.00](https://border.bot/countries/united-states/hs-codes/2934997000) Other, Other, Other, Other, Morpholinoethyl chloride hydrochloride; 2-Methyl-2,5-dioxo-1-oxa-2-phospholan; and (6R-trans)-7-Amino-3-methyl-8-oxo-5- thia-1-azabicyclo[4.2.0]-oct-2-ene-2- carboxylic acid. Duty (MFN): free
- [2934.99.90.01](https://border.bot/countries/united-states/hs-codes/2934999001) Other, Other, Other, Other, Other. Duty (MFN): 6.5%

## In other countries

No other national tariff on border.bot has live lines under 2934.99 yet.

- [The Harmonized System text for 2934.99](https://border.bot/hs-codes/293499)

- Previous subheading: [2934.92](https://border.bot/countries/united-states/hs-codes/293492) Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds
- Next subheading: [2935.10](https://border.bot/countries/united-states/hs-codes/293510) Sulfonamides

## Frequently asked questions

### How many national tariff lines does the United States tariff have under HS 2934.99?

The United States tariff splits HS 2934.99 (other: Other) into 22 national lines: 2934.99.01.00 (mycophenolate mofetil), 2934.99.03.00 (2-Acetylbenzo(b)thiophene; 3-Methylene-7-(2-phenoxyacetamido)- cephan-4-carboxylic acid, p-nitrobenzyl ester, 1-oxide; and Naphth[1,2-d]-[1,2,3]-oxadiazole-5-sulfonic acid and its sodium salt), 2934.99.05.00 (5-Amino-3-phenyl-1,2,4-thiadiazole (3-Phenyl-5-amino-1,2,4-thiadiazole); 2-Hydroxybenzoxazole (Benzoxazolone); 4-Phenylmorpholine; 1,9-Thianthrenedicarboxylic acid; and Thioxanthene-9-one (Thioxanthone)), 2934.99.06.00 (7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts) and 18 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/293499.json