# United States tariff line 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)

> In the United States tariff, line 2934.99.05.00 covers 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). The general (MFN) duty rate is 5.8%. It falls under HS subheading 2934.99 in heading 29.34 (chapter 29).

Source: https://border.bot/countries/united-states/hs-codes/2934990500
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) / [2934.99.05.00](https://border.bot/countries/united-states/hs-codes/2934990500)

## Key facts

- Tariff line: 2934.99.05.00
- Covers: 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%
- Preferential rates: From free (17 programmes or origins)
- Additional duties: None recorded
- Restrictions: None recorded
- Tariff: [United States](https://border.bot/countries/united-states)
- HS subheading: [2934.99](https://border.bot/hs-codes/293499)

## What this line covers

In the United States tariff, line 2934.99.05.00 covers 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).

Its legal text is “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)”, read under “Other”, “Other” and “Aromatic or modified aromatic”.

## How it is structured

It falls under HS subheading 2934.99 in heading 29.34 (chapter 29). The first six digits are the Harmonized System code; the 4 digits after them are added by the United States tariff.

- Chapter 29: Organic chemicals
- Heading 29.34: Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds
- Subheading 2934.99: Other
- Within the subheading: Other
- Within the subheading: Aromatic or modified aromatic
- Line 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)

## Duty

The general (MFN) duty rate is 5.8%.

Duty-free entry applies to goods that qualify under 16 programmes, and to goods from a group of origins (origin group A+).

- Free: a group of origins (origin group A+) (A+)
- Free: United States-Australia Free Trade Agreement (AU)
- Free: United States-Bahrain Free Trade Agreement Implementation Act (BH)
- Free: United States-Chile Free Trade Agreement (CL)
- Free: United States-Colombia Trade Promotion Agreement Implementation Act (CO)
- Free: African Growth and Opportunity Act (D)
- Free: Caribbean Basin Economic Recovery Act (E)
- Free: United States-Israel Free Trade Area (IL)
- Free: United States-Jordan Free Trade Area Implementation Act (JO)
- Free: United States-Korea Free Trade Agreement Implementation Act (KR)
- Free: United States-Morocco Free Trade Agreement Implementation Act (MA)
- Free: United States-Oman Free Trade Agreement Implementation Act (OM)
- Free: Dominican Republic-Central America-United States Free Trade Agreement (P)
- Free: United States-Panama Trade Promotion Agreement Implementation Act (PA)
- Free: United States-Peru Trade Promotion Agreement Implementation Act (PE)
- Free: United States-Mexico-Canada Agreement (S)
- Free: United States-Singapore Free Trade Agreement (SG)

## 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)

## Other lines under 2934.99

- [2934.99.01.00](https://border.bot/countries/united-states/hs-codes/2934990100) Mycophenolate mofetil
- [2934.99.03.00](https://border.bot/countries/united-states/hs-codes/2934990300) 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
- [2934.99.06.00](https://border.bot/countries/united-states/hs-codes/2934990600) 7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts
- [2934.99.07.00](https://border.bot/countries/united-states/hs-codes/2934990700) Ethyl 2-[4-[(6-chloro-2-benzoxazolyl)oxy]- phenoxy]propanoate (Fenoxaprop-ethyl)
- [2934.99.08.00](https://border.bot/countries/united-states/hs-codes/2934990800) 2,5-Diphenyloxazole
- [2934.99.09.00](https://border.bot/countries/united-states/hs-codes/2934990900) 1,2-Benzisothiazolin-3-one
- [2934.99.11.00](https://border.bot/countries/united-states/hs-codes/2934991100) 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)
- [2934.99.12.00](https://border.bot/countries/united-states/hs-codes/2934991200) Fungicides
- [2934.99.15.00](https://border.bot/countries/united-states/hs-codes/2934991500) Herbicides
- [2934.99.16.00](https://border.bot/countries/united-states/hs-codes/2934991600) Insecticides
- [2934.99.18.00](https://border.bot/countries/united-states/hs-codes/2934991800) Other
- [2934.99.20.00](https://border.bot/countries/united-states/hs-codes/2934992000) Photographic chemicals
- [2934.99.30.00](https://border.bot/countries/united-states/hs-codes/2934993000) Drugs
- [2934.99.39.00](https://border.bot/countries/united-states/hs-codes/2934993900) Products described in additional U.S. note 3 to section VI
- [2934.99.44.00](https://border.bot/countries/united-states/hs-codes/2934994400) Other
- [2934.99.47.20](https://border.bot/countries/united-states/hs-codes/2934994720) Rocuronium (INN) and its salts
- [2934.99.47.30](https://border.bot/countries/united-states/hs-codes/2934994730) Tacrolimus (INN) and its salts
- [2934.99.47.40](https://border.bot/countries/united-states/hs-codes/2934994740) Timolol maleate and its salts
- [2934.99.47.90](https://border.bot/countries/united-states/hs-codes/2934994790) Other
- [2934.99.70.00](https://border.bot/countries/united-states/hs-codes/2934997000) 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
- [2934.99.90.01](https://border.bot/countries/united-states/hs-codes/2934999001) Other

- Previous line: [2934.99.03.00](https://border.bot/countries/united-states/hs-codes/2934990300) 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
- Next line: [2934.99.06.00](https://border.bot/countries/united-states/hs-codes/2934990600) 7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts

## Frequently asked questions

### What does tariff line 2934.99.05.00 cover in the United States tariff?

In the United States tariff, line 2934.99.05.00 covers 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).

### What is the general (MFN) duty on 2934.99.05.00 in the United States?

The general (MFN) duty rate is 5.8%.

### Which preferential rates apply to 2934.99.05.00?

Duty-free entry applies to goods that qualify under 16 programmes: the United States-Australia Free Trade Agreement, the United States-Bahrain Free Trade Agreement Implementation Act, the United States-Chile Free Trade Agreement, the United States-Colombia Trade Promotion Agreement Implementation Act, African Growth and Opportunity Act, Caribbean Basin Economic Recovery Act, the United States-Israel Free Trade Area, the United States-Jordan Free Trade Area Implementation Act, the United States-Korea Free Trade Agreement Implementation Act, the United States-Morocco Free Trade Agreement Implementation Act, the United States-Oman Free Trade Agreement Implementation Act, the Dominican Republic-Central America-United States Free Trade Agreement, the United States-Panama Trade Promotion Agreement Implementation Act, the United States-Peru Trade Promotion Agreement Implementation Act, the United States-Mexico-Canada Agreement and the United States-Singapore Free Trade Agreement, and to goods from a group of origins (origin group A+).

## 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/2934990500.json