Analysis
HTS 2933.99.05 covers acridine and indole under heading 2933 (heterocyclic compounds with nitrogen hetero-atom(s) only).
Rates on the nearby lines range from duty-free to 6.5%. The costliest confusion would be with 2933.99.97 (other: other) at 6.5%, a difference of 6.5 points on the customs value.
There is no general-rate duty on this line, which puts it with roughly 26% of the 1050 tariff lines in chapter 29 that are also free. 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, the industry a domestic producer of these goods reports under.
Every edition we compared, from Jan 2023 to Oct 2026 (Rev. 22), shows the same general rate of Free.
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 |
| 2933.99.06 | 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% |
| 2933.99.51 | Hydralazine hydrochloride | Free |
| 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% |