Analysis
HTS 2933.31.00 covers pyridine and its salts under heading 2933 (heterocyclic compounds with nitrogen hetero-atom(s) only).
Neighbouring lines carry rates from duty-free to 6.5%, so the exact line matters. The widest gap is with 2933.39.92 (other: other), at 6.5%: a product that belongs there but is entered here, or the reverse, changes the duty by 6.5 percentage points.
Goods classified here enter the United States duty-free at the general (normal trade relations) rate, as do about 26% of the 1050 tariff lines in chapter 29. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.
Census statistics map these goods to NAICS 325199 (All Other Basic Organic Chemical Manufacturing), an industry of 894 US establishments employing 77,304 people. That is the industry code a US manufacturer of the same product would normally use.
The general rate of Free has not changed in any edition of the schedule since Jan 2023.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 2933.11.00 | Phenazone (Antipyrine) and its derivatives | 6.5% |
| 2933.19.04 | Aminomethylphenylpyrazole (Phenylmethylaminopyrazole); and 3-Methyl-1-(p-tolyl)-2-pyrazolin-5-one (p-Tolyl methyl pyrazolone) | Free |
| 2933.19.08 | 3-(5-Amino-3-methyl-1H-pyrazol-1-yl)- benzenesulfonic acid; Amino-J-pyrazolone; 3-Amino-1-(2,4,6-trichlorophenyl)-5- pyrazolone; 3-Carboxy-1,4-sulfophenylpyrazol-5-one; 4-Chloro-3-(3-methyl-5-oxo-2-pyrazolin-1- yl)benzenesulfonic acid; 1-(m-Chlorophenyl)-3-methyl-2-pyrazolin- 5-one;p-Chloropyrazolone; 1-(2',5'-Dichlorophenyl)-3-methyl-2- pyrazolin-5-one; 1-(o-Ethylphenyl)-3-methyl-2-pyrazolin- 5-one; 5-Imino-3-methyl-1-phenylpyrazole; 5-Imino-3-methyl-1-(m-sulfophenyl)- pyrazole; 2,4-Methylcarboxypyrazolic acid; Methylphenylpyrazolone; and Sulfinpyrazone | 5.8% |
| 2933.19.15 | 1,2-Dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulfate (Difenzoquat methyl sulfate) | Free |
| 2933.19.18 | 2-Chloro-5-sulfophenylmethylpyrazolone; 2,5-Dichloro-4-(3-methyl-5-oxo-2- pyrazolin-1-yl) benzenesulfonic acid; Phenyl carbethoxypyrazolone;m-Sulfaminopyrazolone (m-Sulfamido- phenyl methyl pyrazolone); and 1-(p-Sulfophenyl)-3-methyl pyrazolone | Free |
| 2933.19.23 | Other: pesticides | 6.5% |
| 2933.19.30 | Photographic chemicals | 6.5% |
| 2933.19.35 | Other: drugs | 6.5% |
| 2933.19.37 | Products described in additional U.S. note 3 to section VI | 6.5% |
| 2933.19.43 | Other: other | 6.5% |
| 2933.19.45 | Other: drugs | 3.7% |
| 2933.19.70 | 3-Methyl-5-pyrazolone | Free |
| 2933.19.90 | Other: other | 6.5% |
| 2933.21.00 | Hydantoin and its derivatives | 6.5% |
| 2933.29.05 | 1-[1-((4-Chloro-2-(trifluoromethyl)phenyl)- imino)-2-propoxyethyl]-1H-imidazole (Triflumizole); and Ethylene thiourea | Free |
| 2933.29.10 | Aromatic or modified aromatic: 2-Phenylimidazole | 5.8% |
| 2933.29.20 | Other: drugs | 6% |
| 2933.29.35 | Products described in additional U.S. note 3 to section VI | 6.5% |
| 2933.29.43 | Other: other | 6.5% |
| 2933.29.45 | Other: drugs | 3.7% |
| 2933.29.60 | Other: imidazole | Free |
| 2933.29.90 | Other: other | 6.5% |
| 2933.32.10 | Piperidine and its salts: piperidine | 6.5% |
| 2933.32.50 | Piperidine and its salts: other | 6.5% |
| 2933.33.01 | Alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN), dipipanone (INN), fentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A, phencyclidine (INN) (PCP), phenoperidine (INN), pipradrol (INN), piritramide (INN), propiram (INN), remifentanil (INN) and trimeperidine (INN); salts thereof | Free |
| 2933.34.00 | Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: other fentanyls and their derivatives | 6.5% |
| 2933.35.00 | Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure: 3-Quinuclidinol | 5.8% |
| 2933.36.00 | 4-Anilino-N-phenethylpiperidine (ANPP) | 6.5% |
| 2933.37.00 | N-Phenethyl-4-piperidone (NPP) | 6.5% |
| 2933.39.08 | 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 methyl-4-methoxy- pyridine (pyrmethyl alcohol); Dipenta methylene thiuram tetra sulfide; 2H-Indol-2-one,1,3-dihydro-1-phenyl-3-(4- pyridinyl methylene); 4-Picolyl chloride hydro chloride; and Piperidino ethyl chloride hydro chloride | Free |
| 2933.39.10 | Collidines, lutidines and picolines | Free |
| 2933.39.20 | p-Chloro-2-benzylpyridine; 4-Chloro-1-methylpiperidine hydrochloride; 1,4-Dimethyl-6-hydroxy-3-cyanopyrid-2-one; Di-(2,2,6,6-tetramethyl-4-hydroxy- piperidine)sebacate; 2-Methyl-5-ethylpyridine; 4-Phenylpropylpyridine; α-Phenylpyridylacetic acid, methyl ester; Picolinic acid; 2-Pyridinecarboxaldehyde; and 2,5-Pyridinedicarboxylic acid | 5.8% |
| 2933.39.21 | Pesticides: fungicides | 6.5% |
| 2933.39.23 | o-Paraquat dichloride | 6.5% |
| 2933.39.25 | Herbicides: other | 6.5% |
| 2933.39.27 | Pesticides: other | 6.5% |
| 2933.39.31 | Antidepressants, tranquilizers and other psychotherapeutic agents | 6.5% |
| 2933.39.41 | Drugs: other | 6.5% |
| 2933.39.61 | Products described in additional U.S. note 3 to section VI | 6.5% |
| 2933.39.92 | Other: other | 6.5% |