Heading 2934: Nucleic acids and their salts, whether or not chemically defined; other heterocyclic…
Every line of heading 2934 in the U.S. Harmonized Tariff Schedule, with its general (column 1) duty rate. Open a code for the landed cost calculator, trade agreement rates and email alerts if the rate changes.
Nucleic acids and their salts, whether or not chemically defined; other heterocyclic compounds
Chapter 29: Organic chemicals. Schedule checked on November 8, 2026.
Not always the total: additional chapter 99 duties (such as Section 232 or Section 301), antidumping or countervailing duties may apply depending on the country of origin. See recent chapter 99 changes →
Tariff lines
| HTS code | Official description | General rate |
|---|---|---|
| 2934.10 | Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the structure: | |
| 2934.10.10.00 | Products described in additional U.S. note 3 to section VI | 6.5% |
| 2934.10.20.00 | Other | 6.5% |
| 2934.10.70.00 | 4,5-Dichloro-2-n-octyl-4-isothiazolin-3-one; Ethyl 2-(2-aminothiazol-4-yl)-2- hydroxyiminoacetate; Ethyl 2-(2-aminothiazol-4-yl)-2- methoxyiminoacetate; 2-Methyl-4-isothiazolin- 3-one; 2-n-Octyl-4-isothiazolin-3-one; and Thiothiamine hydrochloride | Free |
| 2934.10.90.00 | Other | 6.5% |
| 2934.20 | Compounds containing in the structure a benzothiazole ring-system (whether or not hydrogenated), not further fused: | |
| 2934.20.05.00 | N-tert-Butyl-2-benzothiazolesulfenamide | 6.5% |
| 2934.20.10.00 | 2,2'-Dithiobisbenzothiazole | 6.5% |
| 2934.20.15.00 | 2-Mercaptobenzothiazole; andN-(Oxydiethylene)benzothiazole-2-sulfenamide | 6.5% |
| 2934.20.20.00 | 2-Mercaptobenzothiazole, sodium salt (2-Benzothiazolethiol, sodium salt) | 6.5% |
| 2934.20.25.00 | 2-Amino-5,6-dichloro benzo thiazole; 2-(4-Amino phenyl)-6-methyl benzo thiazole-7- sulfonic acid; 2-Amino-6-nitro benzo thiazole; andN,N-Di cyclo hexyl-2-benzo thiazole sulfenamide | Free |
| 2934.20.30.00 | 2-Amino-6-methoxy benzo thiazole; 2-Amino-6-methyl benzo thiazole; 6-Ethoxy-2-benzo thiazo lethiol; 3-Methyl benzo thiazole-2-hydrazone; and Primuline base | 5.8% |
| 2934.20.35.00 | Pesticides | 6.5% |
| 2934.20.40.00 | Products described in additional U.S. note 3 to section VI | 6.5% |
| 2934.20.80.00 | Other | 6.5% |
| 2934.30 | Compounds containing in the structure a phenothiazine ring-system (whether or not hydrogenated), not further fused: | |
| 2934.30.12.00 | 2-(Trifluoromethyl)phenothiazine | 6.5% |
| 2934.30.18.00 | Ethyl (1H-phenothiazin-2,4,1)carbamate | Free |
| 2934.30.23.00 | Antidepressants, tranquilizers and other psychotherapeutic agents | 6.5% |
| 2934.30.27.00 | Other | 6.5% |
| 2934.30.43.00 | Products described in additional U.S. note 3 to section VI | 6.5% |
| 2934.30.50.00 | Other | 6.5% |
| 2934.91.00.00 | Aminorex (INN), brotizolam (INN), clotiazepam (INN), cloxazolam (INN), dextromoramide (INN), haloxazolam (INN), ketazolam (INN), mesocarb (INN), oxazolam (INN), pemoline (INN), phendimetrazine (INN), phenmetrazine (INN) and sufentanil (INN); salts thereof | Free |
| 2934.92.00.00 | Other fentanyls and their derivatives | 6.5% |
| 2934.99 | Other: | |
| 2934.99.01.00 | Mycophenolate mofetil | Free |
| 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 | Free |
| 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) | 5.8% |
| 2934.99.06.00 | 7-Nitronaphth[1,2]oxadiazole-5-sulfonic acid and its salts | 6.5% |
| 2934.99.07.00 | Ethyl 2-[4-[(6-chloro-2-benzoxazolyl)oxy]- phenoxy]propanoate (Fenoxaprop-ethyl) | Free |
| 2934.99.08.00 | 2,5-Diphenyloxazole | 6.5% |
| 2934.99.09.00 | 1,2-Benzisothiazolin-3-one | Free |
| 2934.99.11.00 | 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) | 6.5% |
| 2934.99.12.00 | Fungicides | 6.5% |
| 2934.99.15.00 | Herbicides | 6.5% |
| 2934.99.16.00 | Insecticides | 6.5% |
| 2934.99.18.00 | Other | 6.5% |
| 2934.99.20.00 | Photographic chemicals | 6.5% |
| 2934.99.30.00 | Drugs | 6.5% |
| 2934.99.39.00 | Products described in additional U.S. note 3 to section VI | 6.5% |
| 2934.99.44.00 | Other | 6.5% |
| 2934.99.47 | Drugs | 3.7% |
| 2934.99.47.20 | Rocuronium (INN) and its salts | |
| 2934.99.47.30 | Tacrolimus (INN) and its salts | |
| 2934.99.47.40 | Timolol maleate and its salts | |
| 2934.99.47.90 | Other | |
| 2934.99.70.00 | 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 | Free |
| 2934.99.90.01 | Other | 6.5% |
Public records · unclaimed listings
U.S. manufacturers in this industry, from public records
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- BEDOUKIAN RESEARCH, INC.
- EMBALMERS' SUPPLY COMPANY, THE
- FMI CHEMICAL, INC.
- HAMPFORD RESEARCH, INC.
- KING INDUSTRIES, INC.
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Exporting this product from the U.S.?
Exports are reported with Schedule B numbers. Heading 2934 has 9 of them. Schedule B lookup →
- 2934.10.0000COMPOUNDS CONTAINING AN UNFUSED THIAZOLE RING (WHETHER OR NOT HYDROGENATED) IN THE STRUCTURE
- 2934.20.0000COMPOUNDS CONTAINING A BENZOTHIAZOLE RING-SYSTEM (WHETHER OR NOT HYDROGENATED), NOT FURTHER FUSED
- 2934.30.1000BUTAPERAZINE MALEATE; CHLORPROMAZINE; ETYMEMAZINE CHLORHYDRATE; FLUPHENAZINE DECANOATE; FLUPHENAZINE ENANTHATE; PIPERACETAZINE,ETC
- 2934.30.2300ANTIDEPRESSANTS, TRANQUILIZERS AND OTHER PSCHOTHERAPEUTIC AGENTS
- 2934.30.2700DRUGS CONTAINING A PHENOTHIAZINE RING SYSTEM (WHETHER OR NOT HYDROGENATED) NOT FURTHER FUSED, NESOI
- 2934.30.5050COMPOUNDS (EXCLUDING DRUGS) CONTAINING A PHENOTHIAZINE RING-SYSTEM (WHETHER OR NOT HYDROGENATED), NOT FURTHER FUSED
- 2934.91.0000AMINOREX (INN), BROTIZOLAM (INN), CLOTIAZEPAM (INN), CLOXAZOLAM (INN), DEXTROMORAMIDE (INN), HALOXAZOLAM (INN), KETAZOLAM (INN), ETC. & SALTS THEREOF
- 2934.92.0000FENTANYLS AND THEIR DERIVATIVES CONTAINING AN UNFUSED THIAZOLE RING, WHETHER OR NOT HYDROGENATED, NESOI
- 2934.99.0005NUCLEIC ACIDS AND THEIR SALTS, WHETHER OR NOT CHEMICALLY DEFINED; OTHER HETEROCYCLIC COMPOUNDS, NESOI
Source: U.S. International Trade Commission, Harmonized Tariff Schedule; Schedule B: U.S. Census Bureau. Information only, not legal or customs advice; U.S. Customs and Border Protection decides the classification and the duty. Confirm with a licensed customs broker before you ship.
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