Analysis
HTS 2933.99.51 covers hydralazine hydrochloride under heading 2933 (heterocyclic compounds with nitrogen hetero-atom(s) only).
Within this group the rate runs from duty-free to 6.5%. Compared with 2933.99.97 (other: other), which pays 6.5%, a misclassification either way moves the duty by 6.5 percentage points.
The normal trade relations rate here is zero, shared by about 26% of the 1050 tariff lines in chapter 29, a useful check when a neighbouring dutiable line is a candidate. 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 325412 (Pharmaceutical Preparation Manufacturing), an industry of 1,436 US establishments employing 170,029 people. That concordance is how imports of this line are compared with US output.
The general rate of Free has not changed in any edition of the schedule since Jan 2023.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 2933.99.01 | Butyl (R)-2-[4-(5-trifluoromethyl-2- pyridinyloxy)phenoxy]propanoate | Free |
| 2933.99.02 | 2-[4-[(6-Chloro-2-quinoxalinyl)oxy]phenoxy]- propionic acid, ethyl ester | Free |
| 2933.99.05 | Acridine and indole | Free |
| 2933.99.06 | α-Butyl-α-(4-chlorophenyl)-1H-1,2,4- triazole-1- propanenitrile (Myclobutanil); andα-[2-(4-Chlorophenyl)ethyl]-α-phenyl-1H- 1,2,4-triazole-1-propanenitrile (Fenbuconazole) | 6.5% |
| 2933.99.08 | 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 alkyl esters; 2-(2H-Benzotriazol-2-yl)-6-dodecyl-4- methyl phenol, in liquid form, branched and linear; and 1,3,3-Trimethyl-2-methyleneindoline | Free |
| 2933.99.11 | Aromatic or modified aromatic: carbazole | Free |
| 2933.99.12 | 6-Bromo-5-methyl-1H-imidazo[4,5-b]- pyridine; 2-sec-Butyl-4-tert-butyl-6-(benzotriazol-2- yl)phenol; 2-tert-Butyl-4-methyl-6-(5-chlorobenzotri- azol-2-yl)phenol; 2,4-Di-tert-butyl-6-(benzotriazol-2-yl)phenol; 2,4-Di-tert-butyl-6-(5-chlorobenzotriazol-2- yl)phenol; 2,3-Dichloro-6-quinoxalinecarbonyl chloride; 1-Hydroxy-2-carbazolecarboxylic acid; 2-Hydroxy-3-carbazolecarboxylic acid; 2-Hydroxy-3-carbazolecarboxylic acid, sodium salt; Iminodibenzyl(10,11-dihydro-5H-dibenz- [b,f]azepine); Indoline; 3-Methylbenzo[f]quinoline; 2-Methylindoline; 2-Methylmercaptobenzimidazole; 1-Methyl-2-phenylindole; 1-Methylpyrazine; 2,4-Methylpyrazolic acid; 2-Phenylbenzimidazole; 2-Phenylindole; Tetramethylpyrazine; 2,3,5-Triphenyltetrazolium chloride;dl-Tryptophan; and Vinylcarbazole, monomer | 5.8% |
| 2933.99.14 | 5-Amino-4-chloro-α-phenyl-3- pyridazinone | 6.5% |
| 2933.99.16 | o-Diquat dibromide (1,1'-Ethylene- 2,2'-dipyridylium dibromide) | Free |
| 2933.99.17 | Other: insecticides | 6.5% |
| 2933.99.22 | Other: other | 6.5% |
| 2933.99.24 | Photographic chemicals | 6.5% |
| 2933.99.26 | Drugs: antihistamines | 6.5% |
| 2933.99.42 | Acriflavine; Acriflavine hydrochloride; Carbadox; and Pyrazinamide | Free |
| 2933.99.46 | Anti-infective agents: other | 6.5% |
| 2933.99.53 | Cardiovascular drugs: other | 6.5% |
| 2933.99.55 | Analgesics, antipyretics and nonhormonal anti-inflammatory agents | 6.5% |
| 2933.99.58 | Droperidol; and Imipramine hydrochloride | Free |
| 2933.99.61 | Antidepressants, tranquilizers and other psychotherapeutic agents: other | 6.5% |
| 2933.99.65 | Anticonvulsants, hypnotics and sedatives | 6.5% |
| 2933.99.70 | Drugs primarily affecting the central nervous system: other | 6.5% |
| 2933.99.75 | Drugs: other | 6.5% |
| 2933.99.79 | Products described in additional U.S. note 3 to section VI | 6.5% |
| 2933.99.82 | Other: other | 6.5% |
| 2933.99.85 | 3-Amino-1,2,4-triazole | 3.7% |
| 2933.99.89 | Hexamethyleneimine | Free |
| 2933.99.90 | Other: drugs | 3.7% |
| 2933.99.97 | Other: other | 6.5% |