Schedule in force 2026-08-31HTS 2026HTSRev17HTS 2933 · Chapter 29
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HTS 2933

Heading 2933 covers heterocyclic compounds with nitrogen hetero-atom(s) only. Duty is assessed at the 10-digit statistical line; the figures here are resolved for 2933.11.00.00, the first line under this heading. Its Column 1 rate is 6.5%; other lines under 2933 carry different Column 1 rates. On top of that, the ad valorem total depends on origin: China carries 19.00% and Italy carries 10.00%.

Chapter 29 · Verified 2026-08-31
HTS 2026HTSRev17

128 statistical lines under this heading · 9 distinct Column 1 rates · highest ad valorem total 19.00% from China · lowest 10.00% from Italy

OriginAd valorem layersLayersReported under
China CHN19.00%mfn + s3019903.05.31
Vietnam VNM19.00%mfn + s3019903.05.84
Thailand THA19.00%mfn + s3019903.05.77
Brazil BRA19.00%mfn + s3019903.05.27
Mexico MEX16.50%mfn + s3019903.05.55
Canada CAN16.50%mfn + s3019903.05.29
India IND16.50%mfn + s3019903.05.44
United Kingdom GBR16.50%mfn + s3019903.05.81
Japan JPN12.50%s3019903.05.49
South Korea KOR12.50%s3019903.05.71
Germany DEU10.00%s3019903.05.39
Italy ITA10.00%s3019903.05.39
Table 1Rate by country of origin for 2933.11.00.00, resolved 2026-08-31. The first statistical line under 2933; other lines may carry different Column 1 rates.
CodeDescriptionColumn 1SpecialUnits
2933.11.00.00Phenazone (Antipyrine) and its derivatives6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.19.04.00Aminomethylphenylpyrazole (Phenylmethylaminopyrazole); and 3-Methyl-1-(p-tolyl)-2-pyrazolin-5-one (p-Tolyl methyl pyrazolone)Free—kg
2933.19.08.003-(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 Sulfinpyrazone5.8%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)kg
2933.19.15.001,2-Dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulfate (Difenzoquat methyl sulfate)Free—kg
2933.19.18.002-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 pyrazoloneFree—kg
2933.19.23.00Pesticides6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2933.19.30.10Couplers, for use in color negative photographic paperinherited—kg
2933.19.30.95Otherinherited—kg
2933.19.35.00Drugs6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.19.37.00Products described in additional U.S. note 3 to section VI6.5%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)kg
2933.19.43.00Other6.5%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)kg
2933.19.45.00Drugs3.7%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.19.70.003-Methyl-5-pyrazoloneFree—kg
2933.19.90.00Other6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.21.00.00Hydantoin and its derivatives6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.29.05.001-[1-((4-Chloro-2-(trifluoromethyl)phenyl)- imino)-2-propoxyethyl]-1H-imidazole (Triflumizole); and Ethylene thioureaFree—kg
2933.29.10.002-Phenylimidazole5.8%Free (A+,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2933.29.20.00Drugs6%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.29.35.00Products described in additional U.S. note 3 to section VI6.5%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.29.43.00Other6.5%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.29.45.00Drugs3.7%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.29.60.00ImidazoleFree—kg
2933.29.90.00Other6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.31.00.00Pyridine and its saltsFree—kg
2933.32.10.00Piperidine6.5%Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG)kg
2933.32.50.00Other6.5%Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG)kg
2933.33.01.00Alfentanil (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 thereofFree—kg
2933.34.00.00Other fentanyls and their derivatives6.5%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.35.00.003-Quinuclidinol5.8%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.36.00.004-Anilino-N-phenethylpiperidine (ANPP)6.5%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.37.00.00N-Phenethyl-4-piperidone (NPP)6.5%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.39.08.001-(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 chlorideFree—kg
2933.39.10.00Collidines, lutidines and picolinesFree—kg
2933.39.20.00p-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 acid5.8%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.39.21.00Fungicides6.5%Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2933.39.23.00o-Paraquat dichloride6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2933.39.25.00Other6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2933.39.27.00Other6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2933.39.31.00Antidepressants, tranquilizers and other psychotherapeutic agents6.5%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.39.41.00Other6.5%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.39.61.103-Quinuclidinyl benzilateinherited—kg
2933.39.61.201-[N,N-Dialkyl (≤C10)-N-(n-(hydroxyl, cyano, acetoxy)alkyl (≤C10)) ammonio]-n-n-[N-(3- dimethylcarbamoxy-α-picolinyl)-N,N-dialkyl (≤C10) ammonio]decane dibromide (n=1-8)inherited—kg
2933.39.61.301,n-Bis[N-(3-dimethylcarbamoxy-α-picolyl)- N,N-dialkyl (≤ C10) ammonio]-alkane-(2,(n-1)- dione) dibromide (n=2-12)inherited—kg
2933.39.61.40N-phenyl-4-piperidinamine (4-AP), tert-butyl 4-(phenylamino)piperidine-1-carboxylate (tert-butyl 4-anilinopiperidine-1-carboxylate, 1-boc-4-AP), norfentanyl (N-phenyl-N-(4-piperidyl)propionamide), piperidin-4-one (4-piperidone) and tert-butyl 4-oxopiperidine-1-carboxylate (1-boc-4-piperidone); salts thereofinherited—kg
2933.39.61.92Otherinherited—kg
2933.39.92.00Other6.5%Free (A+,AU,BH,CL,CO,D,E,IL,JO,K,KR,MA,OM,P,PA,PE,S,SG)kg
2933.41.00.00Levorphanol (INN) and its saltsFree—kg
2933.49.08.004,7-Dichloroquinoline6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2933.49.10.00Ethoxyquin (1,2-Dihydro-6-ethoxy-2,2,4- trimethylquinoline)6.5%Free (A,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2933.49.15.008-Methylquinoline and Isoquinoline5.8%Free (A+,AU,BH,CL,CO,D, E,IL, JO, KR,MA,OM,P, PA,PE,S,SG)kg
2933.49.17.00Ethyl ethyl-6,7,8-trifluoro-1,4-dihydro-4-oxo-3- quinolinecarboxylateFree—kg
2933.49.20.005-Chloro-7-iodo-8-quinolinol (Iodo chlo rhydroxy quin); Deco quinate; Diiodo hydroxy quin; and Oxy quinoline sulfate6.5%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)kg
2933.49.26.00Other6.5%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,MA,OM,P, PA,PE,S,SG)kg
2933.49.30.00Pesticides6.5%Free (A*,AU,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG)kg
2933.49.60.00Products described in additional U.S. note 3 to section VI6.5%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)kg
2933.49.70.00Other6.5%Free (A+,AU,BH,CL,CO,D, E,IL,JO,K, KR,L,MA,OM,P, PA,PE,S,SG)kg
2933.52.10.00Malonylurea (barbituric acid)Free—kg
2933.52.90.00OtherFree—kg
2933.53.00.00Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereofFree—kg
2933.54.00.00Other derivatives of malonylurea (barbituric acid); salts thereof3.7%Free (A+,AU,BH,CL,CO,D, E,IL, JO,K,KR, L,MA,OM,P, PA,PE,S,SG)kg
Table 2Statistical suffixes under 2933. Duty is assessed at the 10-digit level; the Column 1 rate is stated at the subheading and inherited below it.
ProgrammeRate as publishedContributionReported underIn force from
Column 1 General (MFN)6.5%6.50%—not established

Source: USITC, Harmonized Tariff Schedule of the United States, 2026 HTS Revision 17, published 2026-08-01. Verified 2026-08-31.

Section 301The duty provided in the applicable subheading + 12.5%12.50%9903.05.312026-07-24

Source: USTR, Notice of Actions in Section 301 Investigations of Various Economies (FR Doc. 2026-15181), published 2026-07-28. Verified 2026-08-31.

Table 3Duty stack for 2933.11.00.00 from China, resolved 2026-08-31.

Common questions

What is the duty rate for HTS 2933?
Heading 2933 covers heterocyclic compounds with nitrogen hetero-atom(s) only. Duty is assessed at the 10-digit statistical line; the figures here are resolved for 2933.11.00.00, the first line under this heading. Its Column 1 rate is 6.5%; other lines under 2933 carry different Column 1 rates. On top of that, the ad valorem total depends on origin: China carries 19.00% and Italy carries 10.00%.
Why does the rate differ by country for the same HTS code?
The Column 1 rate is the same for every origin with normal trade relations. Trade-remedy duties under Sections 232, 301 and 338 are imposed by origin, by product, or by both, so two shipments of the same article from different countries can carry very different totals.
Is this the rate I will actually pay?
It is the rate that applies to this classification and origin on the date shown. The duty owed on a specific entry also depends on the 10-digit statistical suffix, declared content where a duty is content-based, preference eligibility, and any AD/CVD order in scope.