HTS heading 2933: Heterocyclic compounds with nitrogen hetero-atom(s) only
Heading 2933 of the US Harmonized Tariff Schedule covers Heterocyclic compounds with nitrogen hetero-atom(s) only. Below: every rated tariff line in it with its general duty rate, Section 301 China status and exclusions, then a page per line with a free duty calculator.
Heading 2933 at a glance
- 113 rated tariff lines; 33 duty-free at the general (MFN) rate.
- Ad valorem general rates from 3.5% to 6.5%.
- Section 301 (products of China): 37 of 113 lines on a list in effect (List 3, List 4A).
Goods named in this heading (official line texts): Phenazone (Antipyrine) and its derivatives, Aminomethylphenylpyrazole (Phenylmethylaminopyrazole); and 3-Methyl-1-(p-tolyl)-2-pyrazolin-5-…, 3-(5-Amino-3-methyl-1H-pyrazol-1-yl)- benzenesulfonic acid; Amino-J-pyrazolone; 3-Amino-1-(2,4…, 1,2-Dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulfate (Difenzoquat methyl sulfate), 2-Chloro-5-sulfophenylmethylpyrazolone; 2,5-Dichloro-4-(3-methyl-5-oxo-2- pyr.
Subheadings (6-digit)
- 2933.11: Compounds containing an unfused pyrazole ring (whether or not hydrogenated) in the structure (1 line)
- 2933.19: Aromatic or modified aromatic (12 lines)
- 2933.21: Compounds containing an unfused imidazole ring (whether or not hydrogenated) in the structure (1 line)
- 2933.29: Aromatic or modified aromatic (8 lines)
- 2933.31: Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure (1 line)
- 2933.32: Piperidine and its salts (2 lines)
- 2933.33: Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure (1 line)
- 2933.34: Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure (1 line)
- 2933.35: Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure (1 line)
- 2933.36: Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure (1 line)
- 2933.37: Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure (1 line)
- 2933.39: Other (11 lines)
- 2933.41: Compounds containing in the structure a quinoline or isoquinoline ring-system (whether or not hydrogenated), not further fused (1 line)
- 2933.49: Other (9 lines)
- 2933.52: Malonylurea (Barbituric acid) and its salts (2 lines)
- 2933.53: Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure (1 line)
- 2933.54: Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure (1 line)
- 2933.55: Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure (1 line)
- 2933.59: Aromatic or modified aromatic (13 lines)
- 2933.61: Compounds containing an unfused triazine ring (whether or not hydrogenated) in the structure (1 line)
- 2933.69: Other (3 lines)
- 2933.71: Lactams (1 line)
- 2933.72: Lactams (1 line)
- 2933.79: Aromatic or modified aromatic (7 lines)
- 2933.91: Other (1 line)
- 2933.92: Other (1 line)
- 2933.99: Aromatic or modified aromatic (29 lines)
All tariff lines in heading 2933
| Line | Description | General | Section 301 (China) | Exclusions |
|---|---|---|---|---|
| 2933.11.00 | Phenazone (Antipyrine) and its derivatives | 6.5% | none | |
| 2933.19.04 | Aminomethylphenylpyrazole (Phenylmethylaminopyrazole); and 3-Methyl-1-(p-tolyl)-2-pyrazolin-5-… | Free | List 4A +7.5% | |
| 2933.19.08 | 3-(5-Amino-3-methyl-1H-pyrazol-1-yl)- benzenesulfonic acid; Amino-J-pyrazolone; 3-Amino-1-(2,4… | 5.8% | List 3 +25% | |
| 2933.19.15 | 1,2-Dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulfate (Difenzoquat methyl sulfate) | Free | List 3 +25% | |
| 2933.19.18 | 2-Chloro-5-sulfophenylmethylpyrazolone; 2,5-Dichloro-4-(3-methyl-5-oxo-2- pyrazolin-1-yl) benz… | Free | List 3 +25% | |
| 2933.19.23 | Other: Pesticides | 6.5% | List 3 +25% | |
| 2933.19.30 | Other: Photographic chemicals | 6.5% | List 3 +25% | |
| 2933.19.35 | Other: Drugs | 6.5% | List 3 +25% | |
| 2933.19.37 | Products described in additional U.S. note 3 to section VI | 6.5% | List 3 +25% | |
| 2933.19.43 | Other: Other | 6.5% | List 3 +25% | |
| 2933.19.45 | Other: Drugs | 3.7% | List 3 +25% | |
| 2933.19.70 | Other: 3-Methyl-5-pyrazolone | Free | List 3 +25% | |
| 2933.19.90 | Other: Other | 6.5% | List 3 +25% | |
| 2933.21.00 | Hydantoin and its derivatives | 6.5% | List 3 +25% | |
| 2933.29.05 | 1-[1-((4-Chloro-2-(trifluoromethyl)phenyl)- imino)-2-propoxyethyl]-1H-imidazole (Triflumizole)… | Free | List 3 +25% | |
| 2933.29.10 | Aromatic or modified aromatic: 2-Phenylimidazole | 5.8% | List 3 +25% | |
| 2933.29.20 | Other: Drugs | 6% | List 3 +25% | |
| 2933.29.35 | Products described in additional U.S. note 3 to section VI | 6.5% | List 3 +25% | |
| 2933.29.43 | Other: Other | 6.5% | List 3 +25% | |
| 2933.29.45 | Other: Drugs | 3.7% | List 3 +25% | |
| 2933.29.60 | Other: Imidazole | Free | List 3 +25% | |
| 2933.29.90 | Other: Other | 6.5% | List 3 +25% | |
| 2933.31.00 | Compounds containing an unfused pyridine ring (whether or not hydrogenated) in t…: Pyridine an… | Free | List 3 +25% | |
| 2933.32.10 | Piperidine and its salts: Piperidine | 6.5% | List 3 +25% | |
| 2933.32.50 | Piperidine and its salts: Other | 6.5% | List 3 +25% | |
| 2933.33.01 | Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN), d… | Free | none | |
| 2933.34.00 | Compounds containing an unfused pyridine ring (whether or not hydrogenated) in t…: Other fenta… | 6.5% | none | |
| 2933.35.00 | Compounds containing an unfused pyridine ring (whether or not hydrogenated) in t…: 3-Quinuclid… | 5.8% | none | |
| 2933.36.00 | 4-Anilino-N-phenethylpiperidine (ANPP) | 6.5% | none | |
| 2933.37.00 | N-Phenethyl-4-piperidone (NPP) | 6.5% | none | |
| 2933.39.08 | 1-(3-Sulfo propyl) pyridinium hydroxide;N,N'-Bis (2,2,6,6-tetra methyl-4-piperidinyl)-1,6- hex… | Free | none | |
| 2933.39.10 | Collidines, lutidines and picolines | Free | none | |
| 2933.39.20 | p-Chloro-2-benzylpyridine; 4-Chloro-1-methylpiperidine hydrochloride; 1,4-Dimethyl-6-hydroxy-3… | 5.8% | none | |
| 2933.39.21 | Pesticides: Fungicides | 6.5% | none | |
| 2933.39.23 | Herbicides: o-Paraquat dichloride | 6.5% | none | |
| 2933.39.25 | Herbicides: Other | 6.5% | none | |
| 2933.39.27 | Pesticides: Other | 6.5% | none | |
| 2933.39.31 | Antidepressants, tranquilizers and other psychotherapeutic agents | 6.5% | none | |
| 2933.39.41 | Drugs: Other | 6.5% | none | |
| 2933.39.61 | Products described in additional U.S. note 3 to section VI | 6.5% | none | |
| 2933.39.92 | Other: Other | 6.5% | none | |
| 2933.41.00 | Levorphanol (INN) and its salts | Free | none | |
| 2933.49.08 | Other: 4,7-Dichloroquinoline | 6.5% | none | |
| 2933.49.10 | Ethoxyquin (1,2-Dihydro-6-ethoxy-2,2,4- trimethylquinoline) | 6.5% | none | |
| 2933.49.15 | 8-Methylquinoline and Isoquinoline | 5.8% | none | |
| 2933.49.17 | Ethyl ethyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-3- quinolinecarboxylate | Free | none | |
| 2933.49.20 | 5-Chloro-7-iodo-8-quinolinol (Iodo chlo rhydroxy quin); Deco quinate; Diiodo hydroxy quin; and… | 6.5% | none | |
| 2933.49.26 | Drugs: Other | 6.5% | none | |
| 2933.49.30 | Other: Pesticides | 6.5% | none | |
| 2933.49.60 | Products described in additional U.S. note 3 to section VI | 6.5% | none | |
| 2933.49.70 | Other: Other | 6.5% | none | |
| 2933.52.10 | Malonylurea (barbituric acid) | Free | none | |
| 2933.52.90 | Malonylurea (Barbituric acid) and its salts: Other | Free | none | |
| 2933.53.00 | Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cycloba… | Free | none | |
| 2933.54.00 | Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazi…: Other deriv… | 3.7% | none | |
| 2933.55.00 | Loprazolam (INN), mecloqualone (INN), methaqualone (INN) and zipeprol (INN); salts thereof | Free | none | |
| 2933.59.10 | Aromatic or modified aromatic: Herbicides | 6.5% | none | |
| 2933.59.15 | Aromatic or modified aromatic: Other | 6.5% | none | |
| 2933.59.18 | Pesticides: Other | 6.5% | none | |
| 2933.59.21 | Antihistamines, including those principally used as anti-nauseants | 6.5% | none | |
| 2933.59.22 | Nicarbazin; and Trimethoprim | 6.5% | none | |
| 2933.59.36 | Anti-infective agents: Other | 6.5% | none | |
| 2933.59.46 | Antidepressants, tranquilizers and other psychotherapeutic agents | 6.5% | none | |
| 2933.59.53 | Aromatic or modified aromatic: Other | 6.5% | none | |
| 2933.59.59 | Drugs: Other | 3.7% | none | |
| 2933.59.70 | Products described in additional U.S. note 3 to section VI | 6.5% | none | |
| 2933.59.80 | Aromatic or modified aromatic: Other | 6.5% | none | |
| 2933.59.85 | 2-Amino-4-chloro-6-methoxy pyrimidine; 2-Amino-4,6-di methoxy pyrimidine; and 6-Methyl uracil | Free | none | |
| 2933.59.95 | Other: Other | 6.5% | none | |
| 2933.61.00 | Compounds containing an unfused triazine ring (whether or not hydrogenated) in t…: Melamine | 3.5% | List 3 +25% | |
| 2933.69.20 | 2,4-Diamino-6-phenyl-1,3,5-triazine | Free | List 3 +25% | |
| 2933.69.50 | Other: Hexamethylenetetramine | 6.3% | List 3 +25% | |
| 2933.69.60 | Other: Other | 3.5% | List 4A +7.5% | |
| 2933.71.00 | 6-Hexanelactam (ε-Caprolactam) | 6.5% | List 3 +25% | |
| 2933.72.00 | Clobazam (INN) and methyprylon (INN) | Free | none | |
| 2933.79.04 | 2,5-Dihydro-3,6-diphenylpyrrolo-(3,4-c)- pyrrole-1,4-dione | Free | List 3 +25% | |
| 2933.79.08 | Products described in additional U.S. note 3 to section VI | 6.5% | List 3 +25% | |
| 2933.79.15 | Other: Other | 6.5% | List 3 +25% | |
| 2933.79.20 | N-Methyl-2-pyrrolidone; and 2-Pyrrolidone | 4.2% | List 3 +25% | |
| 2933.79.30 | N-Vinyl-2-pyrrolidone, monomer | 5.5% | List 3 +25% | |
| 2933.79.40 | 12-Aminododecanoic acid lactam | Free | List 3 +25% | |
| 2933.79.85 | Other: Other | 6.5% | List 3 +25% | |
| 2933.91.00 | Alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), clorazepate, delo… | Free | none | |
| 2933.92.00 | Other: Azinphos-methyl | Free | List 3 +25% | |
| 2933.99.01 | Butyl (R)-2-[4-(5-trifluoromethyl-2- pyridinyloxy)phenoxy]propanoate | Free | none | |
| 2933.99.02 | 2-[4-[(6-Chloro-2-quinoxalinyl)oxy]phenoxy]- propionic acid, ethyl ester | Free | none | |
| 2933.99.05 | Aromatic or modified aromatic: Acridine and indole | Free | none | |
| 2933.99.06 | α-Butyl-α-(4-chlorophenyl)-1H-1,2,4- triazole-1- propanenitrile (Myclobutanil); andα-[2-(4-Chl… | 6.5% | none | |
| 2933.99.08 | Aceto acetyl-5-amino benz imidazolone; 3-(2H-Benzo triazol-2-yl)-5-(tert-butyl)-4- hydroxy ben… | Free | none | |
| 2933.99.11 | Aromatic or modified aromatic: Carbazole | Free | none | |
| 2933.99.12 | 6-Bromo-5-methyl-1H-imidazo[4,5-b]- pyridine; 2-sec-Butyl-4-tert-butyl-6-(benzotriazol-2- yl)p… | 5.8% | none | |
| 2933.99.14 | 5-Amino-4-chloro-α-phenyl-3- pyridazinone | 6.5% | none | |
| 2933.99.16 | o-Diquat dibromide (1,1'-Ethylene- 2,2'-dipyridylium dibromide) | Free | none | |
| 2933.99.17 | Other: Insecticides | 6.5% | none | |
| 2933.99.22 | Other: Other | 6.5% | none | |
| 2933.99.24 | Other: Photographic chemicals | 6.5% | none | |
| 2933.99.26 | Drugs: Antihistamines | 6.5% | none | |
| 2933.99.42 | Acriflavine; Acriflavine hydrochloride; Carbadox; and Pyrazinamide | Free | none | |
| 2933.99.46 | Anti-infective agents: Other | 6.5% | none | |
| 2933.99.51 | Cardiovascular drugs: Hydralazine hydrochloride | Free | none | |
| 2933.99.53 | Cardiovascular drugs: Other | 6.5% | none | |
| 2933.99.55 | Analgesics, antipyretics and nonhormonal anti-inflammatory agents | 6.5% | none | |
| 2933.99.58 | Droperidol; and Imipramine hydrochloride | Free | none | |
| 2933.99.61 | Antidepressants, tranquilizers and other psychotherapeutic agents: Other | 6.5% | none | |
| 2933.99.65 | Anticonvulsants, hypnotics and sedatives | 6.5% | none | |
| 2933.99.70 | Drugs primarily affecting the central nervous system: Other | 6.5% | none | |
| 2933.99.75 | Drugs: Other | 6.5% | none | |
| 2933.99.79 | Products described in additional U.S. note 3 to section VI | 6.5% | none | |
| 2933.99.82 | Other: Other | 6.5% | none | |
| 2933.99.85 | Other: 3-Amino-1,2,4-triazole | 3.7% | none | |
| 2933.99.89 | Other: Hexamethyleneimine | Free | none | |
| 2933.99.90 | Other: Drugs | 3.7% | none | |
| 2933.99.97 | Other: Other | 6.5% | none |
All of chapter 29 · Chapter 29 rate summary · HTS lookup
General information from the official US Harmonized Tariff Schedule (USITC) and USTR Section 301 notices in HTS Chapter 99; not legal or customs advice. Classification is decided by CBP; confirm with a licensed customs broker or a CBP binding ruling.
🔔 Get a browser alert when US tariffs change (free, no email, one click to stop).