HTS 2933: Heterocyclic compounds with nitrogen hetero-atom(s) only
113 codes. Pick one to see its duty from every country of origin. From the USITC schedule, Revision 20 (2026).
2933.19: Other
- 2933.19.04Aminomethylphenylpyrazole and p-tolyl methyl pyrazoloneRegular dutyFree
- 2933.19.08Listed pyrazolones incl. sulfinpyrazone and methylphenylpyrazoloneRegular duty5.8%
- 2933.19.15Difenzoquat methyl sulfateRegular dutyFree
- 2933.19.18Listed sulfophenyl pyrazolones and phenyl carbethoxypyrazoloneRegular dutyFree
- 2933.19.23Other (modified) aromatic pyrazole pesticidesRegular duty6.5%
- 2933.19.30Other (modified) aromatic pyrazole photographic chemicalsRegular duty6.5%
- 2933.19.35Other (modified) aromatic pyrazole drugsRegular duty6.5%
- 2933.19.37Other (modified) aromatic pyrazoles under U.S. note 3Regular duty6.5%
- 2933.19.43Other (modified) aromatic pyrazoles, not under U.S. note 3Regular duty6.5%
- 2933.19.45Other non-aromatic pyrazole drugsRegular duty3.7%
- 2933.19.703-Methyl-5-pyrazoloneRegular dutyFree
- 2933.19.90Other non-aromatic pyrazole compoundsRegular duty6.5%
- 2933.21.00Hydantoin and its derivativesRegular duty6.5%
2933.29: Other
- 2933.29.05Triflumizole and ethylene thioureaRegular dutyFree
- 2933.29.102-PhenylimidazoleRegular duty5.8%
- 2933.29.20Other (modified) aromatic imidazole drugsRegular duty6%
- 2933.29.35Other (modified) aromatic imidazoles under U.S. note 3Regular duty6.5%
- 2933.29.43Other (modified) aromatic imidazoles, not under U.S. note 3Regular duty6.5%
- 2933.29.45Other non-aromatic imidazole drugsRegular duty3.7%
- 2933.29.60ImidazoleRegular dutyFree
- 2933.29.90Other non-aromatic imidazole compoundsRegular duty6.5%
- 2933.31.00Pyridine and its saltsRegular dutyFree
2933.32: Piperidine and its salts
- 2933.32.10PiperidineRegular duty6.5%
- 2933.32.50Salts of piperidineRegular duty6.5%
- 2933.33.01Fentanyl, pethidine, methylphenidate and other listed drugs; saltsRegular dutyFree
- 2933.34.00Other fentanyls and their derivativesRegular duty6.5%
- 2933.35.003-QuinuclidinolRegular duty5.8%
- 2933.36.004-Anilino-N-phenethylpiperidine (ANPP)Regular duty6.5%
- 2933.37.00N-Phenethyl-4-piperidone (NPP)Regular duty6.5%
2933.39: Other
- 2933.39.08Listed pyridine and piperidine compounds incl. 4-picolyl chloride HClRegular dutyFree
- 2933.39.10Collidines, lutidines and picolinesRegular dutyFree
- 2933.39.20Listed pyridines incl. picolinic acid and 2-methyl-5-ethylpyridineRegular duty5.8%
- 2933.39.21Other pyridine-ring fungicidesRegular duty6.5%
- 2933.39.23Paraquat dichlorideRegular duty6.5%
- 2933.39.25Other pyridine-ring herbicidesRegular duty6.5%
- 2933.39.27Other pyridine-ring pesticides (not fungicides or herbicides)Regular duty6.5%
- 2933.39.31Pyridine-ring antidepressants, tranquilizers, other psychotherapeuticsRegular duty6.5%
- 2933.39.41Other pyridine-ring drugsRegular duty6.5%
- 2933.39.61Other pyridine-ring compounds under U.S. note 3 to section VIRegular duty6.5%
- 2933.39.92Other pyridine-ring compounds, not under U.S. note 3Regular duty6.5%
- 2933.41.00Levorphanol and its saltsRegular dutyFree
2933.49: Other
- 2933.49.084,7-DichloroquinolineRegular duty6.5%
- 2933.49.10EthoxyquinRegular duty6.5%
- 2933.49.158-Methylquinoline and isoquinolineRegular duty5.8%
- 2933.49.17Ethyl 1-ethyl-6,7,8-trifluoro-4-oxoquinoline-3-carboxylateRegular dutyFree
- 2933.49.20Clioquinol, decoquinate, diiodohydroxyquinoline, oxyquinoline sulfateRegular duty6.5%
- 2933.49.26Other quinoline or isoquinoline drugsRegular duty6.5%
- 2933.49.30Quinoline or isoquinoline pesticidesRegular duty6.5%
- 2933.49.60Other quinolines and isoquinolines under U.S. note 3Regular duty6.5%
- 2933.49.70Other quinolines and isoquinolines, not under U.S. note 3Regular duty6.5%
2933.52: Malonylurea (Barbituric acid) and its salts
- 2933.52.10Malonylurea (barbituric acid)Regular dutyFree
- 2933.52.90Salts of malonylurea (barbituric acid)Regular dutyFree
- 2933.53.00Barbital, phenobarbital and other named barbiturates; saltsRegular dutyFree
- 2933.54.00Other barbituric acid derivatives; saltsRegular duty3.7%
- 2933.55.00Loprazolam, mecloqualone, methaqualone, zipeprol; saltsRegular dutyFree
2933.59: Other
- 2933.59.10(Modified) aromatic pyrimidine or piperazine herbicidesRegular duty6.5%
- 2933.59.15Other (modified) aromatic pyrimidine or piperazine pesticidesRegular duty6.5%
- 2933.59.18Non-aromatic pyrimidine or piperazine pesticidesRegular duty6.5%
- 2933.59.21(Modified) aromatic pyrimidine or piperazine antihistaminesRegular duty6.5%
- 2933.59.22Nicarbazin and trimethoprimRegular duty6.5%
- 2933.59.36Other (modified) aromatic pyrimidine or piperazine anti-infectivesRegular duty6.5%
- 2933.59.46(Modified) aromatic pyrimidine or piperazine psychotherapeutic drugsRegular duty6.5%
- 2933.59.53Other (modified) aromatic pyrimidine or piperazine drugsRegular duty6.5%
- 2933.59.59Non-aromatic pyrimidine or piperazine drugsRegular duty3.7%
- 2933.59.70Other (modified) aromatic pyrimidines or piperazines, U.S. note 3Regular duty6.5%
- 2933.59.80Other (modified) aromatic pyrimidines or piperazines, not note 3Regular duty6.5%
- 2933.59.85Two listed aminomethoxypyrimidines and 6-methyluracilRegular dutyFree
- 2933.59.95Other non-aromatic pyrimidines or piperazinesRegular duty6.5%
- 2933.61.00MelamineRegular duty3.5%
2933.69: Other
2933.79: Other lactams
- 2933.79.043,6-Diphenyl-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione (DPP)Regular dutyFree
- 2933.79.08Other (modified) aromatic lactams under U.S. note 3Regular duty6.5%
- 2933.79.15Other (modified) aromatic lactams, not under U.S. note 3Regular duty6.5%
- 2933.79.20N-Methyl-2-pyrrolidone and 2-pyrrolidoneRegular duty4.2%
- 2933.79.30N-Vinyl-2-pyrrolidone, monomerRegular duty5.5%
- 2933.79.40Laurolactam (12-aminododecanoic acid lactam)Regular dutyFree
- 2933.79.85Other non-aromatic lactamsRegular duty6.5%
- 2933.91.00Alprazolam, diazepam, lorazepam and other listed drugs; saltsRegular dutyFree
- 2933.92.00Azinphos-methylRegular dutyFree
2933.99: Other
- 2933.99.01Fluazifop-P-butylRegular dutyFree
- 2933.99.02Quizalofop-ethylRegular dutyFree
- 2933.99.05Acridine and indoleRegular dutyFree
- 2933.99.06Myclobutanil and fenbuconazoleRegular duty6.5%
- 2933.99.08Two benzotriazole phenols, Fischer's base, an aminobenzimidazoloneRegular dutyFree
- 2933.99.11CarbazoleRegular dutyFree
- 2933.99.12Listed aromatic N-heterocycles incl. indoline and DL-tryptophanRegular duty5.8%
- 2933.99.14Chloridazon (pyrazon)Regular duty6.5%
- 2933.99.16Diquat dibromideRegular dutyFree
- 2933.99.17Other (modified) aromatic N-heterocycle insecticidesRegular duty6.5%
- 2933.99.22Other (modified) aromatic N-heterocycle pesticidesRegular duty6.5%
- 2933.99.24Other (modified) aromatic N-heterocycle photographic chemicalsRegular duty6.5%
- 2933.99.26Other (modified) aromatic N-heterocycle antihistaminesRegular duty6.5%
- 2933.99.42Acriflavine (and its hydrochloride), carbadox and pyrazinamideRegular dutyFree
- 2933.99.46Other (modified) aromatic N-heterocycle anti-infectivesRegular duty6.5%
- 2933.99.51Hydralazine hydrochlorideRegular dutyFree
- 2933.99.53Other (modified) aromatic N-heterocycle cardiovascular drugsRegular duty6.5%
- 2933.99.55(Modified) aromatic N-heterocycle analgesics, antipyretics, NSAIDsRegular duty6.5%
- 2933.99.58Droperidol and imipramine hydrochlorideRegular dutyFree
- 2933.99.61Other (modified) aromatic N-heterocycle psychotherapeutic drugsRegular duty6.5%
- 2933.99.65(Modified) aromatic heterocycle anticonvulsants, hypnotics, sedativesRegular duty6.5%
- 2933.99.70Other (modified) aromatic N-heterocycle central nervous system drugsRegular duty6.5%
- 2933.99.75Other (modified) aromatic N-heterocycle drugsRegular duty6.5%
- 2933.99.79Other (modified) aromatic N-heterocycles under U.S. note 3Regular duty6.5%
- 2933.99.82Other (modified) aromatic N-heterocycles, not U.S. note 3Regular duty6.5%
- 2933.99.853-Amino-1,2,4-triazole (amitrole)Regular duty3.7%
- 2933.99.89HexamethyleneimineRegular dutyFree
- 2933.99.90Other non-aromatic N-heterocycle drugsRegular duty3.7%
- 2933.99.97Other non-aromatic N-heterocyclesRegular duty6.5%