HTS 2933
Heterocyclic compounds with nitrogen hetero-atom(s) only
As of Revision 22 (2026), effective Oct 30, 2026Source: USITC HTS ↗
Chapters › 2933
Chapter 99 measures listing products under 2933
Potash that is a product of Mexico, as provided for in U.S. note 2(c) to this subchapter
Mexico101 listed productsExcept for products described in headings 9903.05.02–9903.05.09, articles the product of Brazil, as provided for in subdivision (a) of U.S. note 50 to this subchapter
Brazil101 listed productsArticles the product of Brazil, as provided for in subdivision (a)(ii) of U.S. note 50 to this subchapter
Brazil101 listed productsArticles the product of Brazil, as provided for in subdivision (a)(iii) of U.S. note 50 to this subchapter
Brazil101 listed productsArticles of civil aircraft (all aircraft other than military aircraft); their engines, parts and components; their other parts, components and subassemblies; and ground flight simulators and their parts and components of Brazil, as provided for in subdivision (a)(iv) of U.S. note 50 to this subchapter
Brazil101 listed productsArticles the product of Brazil that are articles for use in pharmaceutical applications, as provided for in subdivision (a)(v) of U.S. note 50 to this subchapter
Brazil101 listed productsArticles of aluminum, of steel, or of copper or derivative aluminum or steel articles; passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo vans) and light trucks; parts of passenger vehicles (sedans, sport utility vehicles, crossover utility vehicles, minivans, and cargo…
Brazil101 listed productsArticles provided for in subdivision (b) of U.S. note 52 to this subchapter
1 listed productArticles for use in pharmaceutical applications, as provided for in subdivision (e) of U.S. note 52 to this subchapter
101 listed productsArticles of textiles or apparel the product of Costa Rica, the Dominican Republic, El Salvador, Guatemala, Honduras or Nicaragua, as provided for in subdivision (i) of U.S. note 52 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided…
China35 listed productsExcept as provided in headings 9903.88.39, 9903.88.42, 9903.88.44, 9903.88.47, 9903.88.49, 9903.88.51, 9903.88.53, 9903.88.55, 9903.88.57, 9903.88.65, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(r) to this subchapter and as provided for in the…
China2 listed productsArticles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter
Russia1 listed product
Lines under 2933
| HTS | Description | General | Column 2 |
|---|---|---|---|
| 2933.11.00.00 | Phenazone (Antipyrine) and its derivatives | 6.5% | 15.4¢/kg + 49.5% |
| 2933.19 | Other: | ||
| 2933.19.04.00 | Aminomethylphenylpyrazole (Phenylmethylaminopyrazole); and 3-Methyl-1-(p-tolyl)-2-pyrazolin-5-one (p-Tolyl methyl pyrazolone) | Free | 15.4¢/kg + 39.5% |
| 2933.19.08.00 | 3-(5-Amino-3-methyl-1H-pyrazol-1-yl)- benzenesulfonic acid; Amino-J-pyrazolone; 3-Amino-1-(2,4,6-trichlorophenyl)-5- pyrazolone… | 5.8% | 15.4¢/kg + 39.5% |
| 2933.19.15.00 | 1,2-Dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulfate (Difenzoquat methyl sulfate) | Free | 15.4¢/kg + 48.5% |
| 2933.19.18.00 | 2-Chloro-5-sulfophenylmethylpyrazolone; 2,5-Dichloro-4-(3-methyl-5-oxo-2- pyrazolin-1-yl) benzenesulfonic acid; Phenyl… | Free | 15.4¢/kg + 52% |
| 2933.19.23.00 | Pesticides | 6.5% | 15.4¢/kg + 48.5% |
| 2933.19.30 | Photographic chemicals | 6.5% | 15.4¢/kg + 50% |
| 2933.19.30.10 | Couplers, for use in color negative photographic paper | ||
| 2933.19.30.95 | Other | ||
| 2933.19.35.00 | Drugs | 6.5% | 15.4¢/kg + 47.5% |
| 2933.19.37.00 | Products described in additional U.S. note 3 to section VI | 6.5% | 15.4¢/kg + 52% |
| 2933.19.43.00 | Other | 6.5% | 15.4¢/kg + 52% |
| 2933.19.45.00 | Drugs | 3.7% | 25% |
| 2933.19.70.00 | 3-Methyl-5-pyrazolone | Free | 30.5% |
| 2933.19.90.00 | Other | 6.5% | 30.5% |
| 2933.21.00.00 | Hydantoin and its derivatives | 6.5% | 15.4¢/kg + 63% |
| 2933.29 | Other: | ||
| 2933.29.05.00 | 1-[1-((4-Chloro-2-(trifluoromethyl)phenyl)- imino)-2-propoxyethyl]-1H-imidazole (Triflumizole); and Ethylene thiourea | Free | 15.4¢/kg + 52% |
| 2933.29.10.00 | 2-Phenylimidazole | 5.8% | 15.4¢/kg + 39.5% |
| 2933.29.20.00 | Drugs | 6% | 15.4¢/kg + 51% |
| 2933.29.35.00 | Products described in additional U.S. note 3 to section VI | 6.5% | 15.4¢/kg + 52% |
| 2933.29.43.00 | Other | 6.5% | 15.4¢/kg + 52% |
| 2933.29.45.00 | Drugs | 3.7% | 25% |
| 2933.29.60.00 | Imidazole | Free | 30.5% |
| 2933.29.90.00 | Other | 6.5% | 30.5% |
| 2933.31.00.00 | Pyridine and its salts | Free | Free |
| 2933.32 | Piperidine and its salts: | ||
| 2933.32.10.00 | Piperidine | 6.5% | 15.4¢/kg + 52% |
| 2933.32.50.00 | Other | 6.5% | 15.4¢/kg + 52% |
| 2933.33.01.00 | Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN)… | Free | 15.4¢/kg + 149.5% |
| 2933.34.00.00 | Other fentanyls and their derivatives | 6.5% | 15.4¢/kg + 52% |
| 2933.35.00.00 | 3-Quinuclidinol | 5.8% | 15.4¢/kg + 39.5% |
| 2933.36.00.00 | 4-Anilino-N-phenethylpiperidine (ANPP) | 6.5% | 15.4¢/kg + 52% |
| 2933.37.00.00 | N-Phenethyl-4-piperidone (NPP) | 6.5% | 15.4¢/kg + 52% |
| 2933.39 | Other: | ||
| 2933.39.08.00 | 1-(3-Sulfo propyl) pyridinium hydroxide;N,N'-Bis (2,2,6,6-tetra methyl-4-piperidinyl)-1,6- hexane diamine; 3,5-Dimethyl-2-hydroxy… | Free | 15.4¢/kg + 52% |
| 2933.39.10.00 | Collidines, lutidines and picolines | Free | Free |
| 2933.39.20.00 | p-Chloro-2-benzylpyridine; 4-Chloro-1-methylpiperidine hydrochloride; 1,4-Dimethyl-6-hydroxy-3-cyanopyrid-2-one… | 5.8% | 15.4¢/kg + 39.5% |
| 2933.39.21.00 | Fungicides | 6.5% | 15.4¢/kg + 40% |
| 2933.39.23.00 | o-Paraquat dichloride | 6.5% | 15.4¢/kg + 40.5% |
| 2933.39.25.00 | Other | 6.5% | 15.4¢/kg + 48.5% |
| 2933.39.27.00 | Other | 6.5% | 15.4¢/kg + 64.5% |
| 2933.39.31.00 | Antidepressants, tranquilizers and other psychotherapeutic agents | 6.5% | 15.4¢/kg + 149.5% |
| 2933.39.41.00 | Other | 6.5% | 15.4¢/kg + 65% |
| 2933.39.61 | Products described in additional U.S. note 3 to section VI | 6.5% | 15.4¢/kg + 52% |
| 2933.39.61.10 | 3-Quinuclidinyl benzilate | ||
| 2933.39.61.20 | 1-[N,N-Dialkyl (≤C10)-N-(n-(hydroxyl, cyano, acetoxy)alkyl (≤C10)) ammonio]-n-n-[N-(3- dimethylcarbamoxy-α-picolinyl)-N,N-dialkyl (≤C10)… | ||
| 2933.39.61.30 | 1,n-Bis[N-(3-dimethylcarbamoxy-α-picolyl)- N,N-dialkyl (≤ C10) ammonio]-alkane-(2,(n-1)- dione) dibromide (n=2-12) | ||
| 2933.39.61.40 | N-phenyl-4-piperidinamine (4-AP), tert-butyl 4-(phenylamino)piperidine-1-carboxylate (tert-butyl 4-anilinopiperidine-1-carboxylate… | ||
| 2933.39.61.92 | Other | ||
| 2933.39.92.00 | Other | 6.5% | 15.4¢/kg + 52% |
| 2933.41.00.00 | Levorphanol (INN) and its salts | Free | 15.4¢/kg + 67.5% |
| 2933.49 | Other: | ||
| 2933.49.08.00 | 4,7-Dichloroquinoline | 6.5% | 15.4¢/kg + 52% |
| 2933.49.10.00 | Ethoxyquin (1,2-Dihydro-6-ethoxy-2,2,4- trimethylquinoline) | 6.5% | 15.4¢/kg + 55% |
| 2933.49.15.00 | 8-Methylquinoline and Isoquinoline | 5.8% | 15.4¢/kg + 39.5% |
| 2933.49.17.00 | Ethyl ethyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-3- quinolinecarboxylate | Free | 15.4¢/kg + 52% |
| 2933.49.20.00 | 5-Chloro-7-iodo-8-quinolinol (Iodo chlo rhydroxy quin); Deco quinate; Diiodo hydroxy quin; and Oxy quinoline sulfate | 6.5% | 15.4¢/kg + 46% |
| 2933.49.26.00 | Other | 6.5% | 15.4¢/kg + 67.5% |
| 2933.49.30.00 | Pesticides | 6.5% | 15.4¢/kg + 40% |
| 2933.49.60.00 | Products described in additional U.S. note 3 to section VI | 6.5% | 15.4¢/kg + 52% |
| 2933.49.70.00 | Other | 6.5% | 15.4¢/kg + 52% |
| 2933.52 | Malonylurea (Barbituric acid) and its salts: | ||
| 2933.52.10.00 | Malonylurea (barbituric acid) | Free | 25% |
| 2933.52.90.00 | Other | Free | 50% |
| 2933.53.00.00 | Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN)… | Free | 50% |
| 2933.54.00.00 | Other derivatives of malonylurea (barbituric acid); salts thereof | 3.7% | 50% |
| 2933.55.00.00 | Loprazolam (INN), mecloqualone (INN), methaqualone (INN) and zipeprol (INN); salts thereof | Free | 15.4¢/kg + 149.5% |
| 2933.59 | Other: | ||
| 2933.59.10.00 | Herbicides | 6.5% | 15.4¢/kg + 48.5% |
| 2933.59.15.00 | Other | 6.5% | 15.4¢/kg + 64.5% |
| 2933.59.18.00 | Other | 6.5% | 30.5% |
| 2933.59.21.00 | Antihistamines, including those principally used as anti-nauseants | 6.5% | 15.4¢/kg + 82% |
| 2933.59.22.00 | Nicarbazin; and Trimethoprim | 6.5% | 15.4¢/kg + 46% |
| 2933.59.36.00 | Other | 6.5% | 15.4¢/kg + 67.5% |
| 2933.59.46.00 | Antidepressants, tranquilizers and other psychotherapeutic agents | 6.5% | 15.4¢/kg + 149.5% |
| 2933.59.53.00 | Other | 6.5% | 15.4¢/kg + 45% |
| 2933.59.59.00 | Other | 3.7% | 25% |
| 2933.59.70.00 | Products described in additional U.S. note 3 to section VI | 6.5% | 15.4¢/kg + 52% |
| 2933.59.80.00 | Other | 6.5% | 15.4¢/kg + 52% |
| 2933.59.85.00 | 2-Amino-4-chloro-6-methoxy pyrimidine; 2-Amino-4,6-di methoxy pyrimidine; and 6-Methyl uracil | Free | 30.5% |
| 2933.59.95.00 | Other | 6.5% | 30.5% |
| 2933.61.00.00 | Melamine | 3.5% | 25% |
| 2933.69 | Other: | ||
| 2933.69.20.00 | 2,4-Diamino-6-phenyl-1,3,5-triazine | Free | 25% |
| 2933.69.50.00 | Hexamethylenetetramine | 6.3% | 58% |
| 2933.69.60 | Other | 3.5% | 25% |
| 2933.69.60.10 | Cyanuric chloride | ||
| 2933.69.60.15 | Sodium dichloroisocyanurate and trichloroisocyanuric acid | ||
| 2933.69.60.21 | Other | ||
| 2933.69.60.30 | Products used principally for rubber processing | ||
| 2933.69.60.50 | Other | ||
| 2933.71.00.00 | 6-Hexanelactam (ε-Caprolactam) | 6.5% | 15.4¢/kg + 40% |
| 2933.72.00.00 | Clobazam (INN) and methyprylon (INN) | Free | 15.4¢/kg + 52% |
| 2933.79 | Other lactams: | ||
| 2933.79.04.00 | 2,5-Dihydro-3,6-diphenylpyrrolo-(3,4-c)- pyrrole-1,4-dione | Free | 15.4¢/kg + 52% |
| 2933.79.08.00 | Products described in additional U.S. note 3 to section VI | 6.5% | 15.4¢/kg + 52% |
| 2933.79.15.00 | Other | 6.5% | 15.4¢/kg + 52% |
| 2933.79.20.00 | N-Methyl-2-pyrrolidone; and 2-Pyrrolidone | 4.2% | 25% |
| 2933.79.30.00 | N-Vinyl-2-pyrrolidone, monomer | 5.5% | 40% |
| 2933.79.40.00 | 12-Aminododecanoic acid lactam | Free | 30.5% |
| 2933.79.85.00 | Other | 6.5% | 30.5% |
| 2933.91.00 | Alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), clorazepate, delorazepam (INN), diazepam (INN), estazolam… | Free | 15.4¢/kg + 149.5% |
| 2933.91.00.10 | Lorazepam (INN); salts thereof | ||
| 2933.91.00.50 | Other | ||
| 2933.92.00.00 | Azinphos-methyl | Free | 15.4¢/kg + 64.5% |
| 2933.99 | Other: | ||
| 2933.99.01.00 | Butyl (R)-2-[4-(5-trifluoromethyl-2- pyridinyloxy)phenoxy]propanoate | Free | 15.4¢/kg + 50% |
| 2933.99.02.00 | 2-[4-[(6-Chloro-2-quinoxalinyl)oxy]phenoxy]- propionic acid, ethyl ester | Free | 15.4¢/kg + 64.5% |
| 2933.99.05.00 | Acridine and indole | Free | Free |
| 2933.99.06.00 | α-Butyl-α-(4-chlorophenyl)-1H-1,2,4- triazole-1- propanenitrile (Myclobutanil); andα-[2-(4-Chlorophenyl)ethyl]-α-phenyl-1H-… | 6.5% | 15.4¢/kg + 64.5% |
| 2933.99.08.00 | Aceto acetyl-5-amino benz imidazolone; 3-(2H-Benzo triazol-2-yl)-5-(tert-butyl)-4- hydroxy benzene propanoic acid, C7-C9 branched or linear… | Free | 15.4¢/kg + 52% |
| 2933.99.11.00 | Carbazole | Free | 15.4¢/kg + 39.5% |
| 2933.99.12.00 | 6-Bromo-5-methyl-1H-imidazo[4,5-b]- pyridine; 2-sec-Butyl-4-tert-butyl-6-(benzotriazol-2- yl)phenol… | 5.8% | 15.4¢/kg + 39.5% |
| 2933.99.14.00 | 5-Amino-4-chloro-α-phenyl-3- pyridazinone | 6.5% | 15.4¢/kg + 40.5% |
| 2933.99.16.00 | o-Diquat dibromide (1,1'-Ethylene- 2,2'-dipyridylium dibromide) | Free | 15.4¢/kg + 40.5% |
| 2933.99.17.01 | Insecticides | 6.5% | 15.4¢/kg + 64.5% |
| 2933.99.22.00 | Other | 6.5% | 15.4¢/kg + 64.5% |
| 2933.99.24.00 | Photographic chemicals | 6.5% | 15.4¢/kg + 50% |
| 2933.99.26.00 | Antihistamines | 6.5% | 15.4¢/kg + 45% |
| 2933.99.42.00 | Acriflavine; Acriflavine hydrochloride; Carbadox; and Pyrazinamide | Free | 15.4¢/kg + 46% |
| 2933.99.46.00 | Other | 6.5% | 15.4¢/kg + 67.5% |
| 2933.99.51.00 | Hydralazine hydrochloride | Free | 15.4¢/kg + 47.5% |
| 2933.99.53.00 | Other | 6.5% | 15.4¢/kg + 65% |
| 2933.99.55 | Analgesics, antipyretics and nonhormonal anti-inflammatory agents | 6.5% | 15.4¢/kg +47.5% |
| 2933.99.55.10 | Tolmetin | ||
| 2933.99.55.20 | Tolmetin sodium dihydrate | ||
| 2933.99.55.30 | Tolmetin sodium (anhydrous) | ||
| 2933.99.55.90 | Other | ||
| 2933.99.58.00 | Droperidol; and Imipramine hydrochloride | Free | 15.4¢/kg + 45.5% |
| 2933.99.61.00 | Other | 6.5% | 15.4¢/kg + 149.5% |
| 2933.99.65.00 | Anticonvulsants, hypnotics and sedatives | 6.5% | 15.4¢/kg + 48.5% |
| 2933.99.70.00 | Other | 6.5% | 15.4¢/kg + 58.5% |
| 2933.99.75.00 | Other | 6.5% | 15.4¢/kg + 45% |
| 2933.99.79.00 | Products described in additional U.S. note 3 to section VI | 6.5% | 15.4¢/kg + 52% |
| 2933.99.82 | Other | 6.5% | 15.4¢/kg + 52% |
| 2933.99.82.10 | Benzotriazole (CAS No. 95-14-7) | ||
| 2933.99.82.20 | Tolyltriazole (CAS No. 29385-43-1) | ||
| 2933.99.82.90 | Other | ||
| 2933.99.85.00 | 3-Amino-1,2,4-triazole | 3.7% | 25% |
| 2933.99.89.00 | Hexamethyleneimine | Free | 30.5% |
| 2933.99.90.00 | Drugs | 3.7% | 25% |
| 2933.99.97.01 | Other | 6.5% | 30.5% |