Heterocyclic compounds with nitrogen hetero-atom(s)…

HS code 29.33: Heterocyclic compounds with nitrogen hetero-atom(s)… 2933.11 with nitrogen hetero-atom(s) only… · 2933.31 containing an unfused pyridine ring…

Source: Turkish Ministry of Trade — Turkish Customs Tariff Schedule (TGTC), 2026 edition. Data last updated: 19 August 2026. Compiled from the official schedule for information only. Binding tariff information is issued by the customs administration.

What this heading covers

Heterocyclic compounds with nitrogen hetero-atom(s) only

The first six digits are the same in every country that applies the Harmonized System; the twelve-digit breakdown below them is specific to Türkiye. This heading has 27 subheadings and 211 twelve-digit codes (2026 schedule).

This heading sits in chapter 29 (Organic chemicals). Classification is governed by the official chapter notes: a note can pull goods into the chapter or push them out of it.

Subheadings and tariff codes

The code used on a customs declaration has twelve digits. The list below gives the six-digit subheading first, then the twelve-digit codes underneath it. Opening a code shows its definition and the Turkish import duty rows registered against it.

Official English wording exists only down to the six-digit HS subheading. The twelve-digit breakdowns below it are national lines published by Türkiye in Turkish only, so they are shown here in Turkish — translating them ourselves would put words on a customs code that no authority has approved.

2933.11 — Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, phenazone (antipyrin) and its derivatives

2933.11.10.00.00 — Propifenazon (INN)
2933.11.90.00.11 — Fenazon (antiprin)
2933.11.90.00.12 — Dimetil dimetilamino fenil pirazolan (amidoprin)
2933.11.90.00.19 — Diğerleri

2933.19 — Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused pyrazole ring (whether or not hydrogenated) in the structure, other than henazone (antipyrin) and its derivatives

2933.19.10.00.00 — Fenilbutazon (INN)
2933.19.90.00.11 — 1-Fenil-3-pirazolidon
2933.19.90.00.19 — Diğerleri

2933.21 — Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused imidazole ring (whether or not hydrogenated) in the structure, hydantoin and its derivatives

2933.21.00.00.11 — Hidantoin
2933.21.00.00.12 — Hidantoinin türevleri

2933.29 — Heterocyclic compounds; with nitrogen hetero-atom(s) only, containing an unfused imidazole ring (whether or not hydrogenated) in the structure, other than hydantoin and its derivatives

2933.29.10.00.11 — Nafazolin hidroklorür ve nafazolin nitrat
2933.29.10.00.12 — Pentalamin
2933.29.10.00.13 — Tolazolin hidroklorür
2933.29.90.00.11 — Lisidin
2933.29.90.00.12 — Ornidazol
2933.29.90.00.13 — Etomidat
2933.29.90.00.19 — Diğerleri

2933.31 — Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, pyridine and its salts

2933.31.00.10.00 — Piridin karboksilik asit (izonikotinik asit)
2933.31.00.90.11 — Piridin
2933.31.00.90.12 — Piridin hidroklorür
2933.31.00.90.19 — Piridinin diğer tuzları

2933.32 — Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, piperidine and its salts

2933.32.00.00.13 — 4-anilinopiperidin (4-AP)
2933.32.00.00.14 — 1-boc-4-anilinopiperidin (1-boc-4-AP)
2933.32.00.00.19 — Diğerleri
2933.32.00.00.21 — Piperidinin tuzları

2933.33 — Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, alfentanil (INN), anileridine (INN), bezitramide (INN), bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN), dipipanone (INN)

2933.33.00.00.11 — Alfentanil (INN)
2933.33.00.00.12 — Anileridine (INN)
2933.33.00.00.13 — Bezitramide (INN)
2933.33.00.00.14 — Bromazepam (INN)
2933.33.00.00.15 — Difenoxin (INN)
2933.33.00.00.16 — Difenoxylate (INN)
2933.33.00.00.17 — Dipipanone (INN
2933.33.00.00.18 — Fentanyl (INN)
2933.33.00.00.21 — Ketobemidone (INN),
2933.33.00.00.22 — Methylphnidate (INN)
2933.33.00.00.23 — Pentazocine (INN)
2933.33.00.00.24 — Pethidine (INN),
2933.33.00.00.25 — Pethidine (INN) ara ürün A
2933.33.00.00.26 — Phencyclidine (INN)(PCP),
2933.33.00.00.27 — Phenoperidine (INN)
2933.33.00.00.28 — Pipradol (INN)
2933.33.00.00.31 — Piritramide (INN),
2933.33.00.00.32 — Propiram (INN)
2933.33.00.00.33 — Trimeperidine (INN)
2933.33.00.00.39 — Diğerleri

2933.39 — Heterocyclic compounds; containing an unfused pyridine ring (whether or not hydrogenated) in the structure, n.e.c. in 2933.3

2933.39.10.00.11 — İproniazit
2933.39.10.00.12 — Ketobemidon hidroklorür
2933.39.10.00.13 — Pridostigmin bromür
2933.39.20.00.00 — 2,3,5,6 - Tetrakloropridin
2933.39.25.00.00 — 3,6 - Dikloropridin -2 - karboksilik asit
2933.39.35.00.00 — 2 - Hidroksietilamonyum - 3,6 - dikloropridin -2 - karboksilat
2933.39.40.00.00 — 2 - Bütoksietil (3,5,6 - trikloro -2 - pridiloksi) asetat
2933.39.45.00.00 — 3,5 - Dikloro - 2,4,6 - trifloropridin
2933.39.50.00.00 — Floroksipir (ISO), metil ester
2933.39.55.00.00 — 4 - Metilpridin
2933.39.99.00.11 — 3-Pikolin (metilpiridin)
2933.39.99.00.12 — Lutidinler
2933.39.99.00.13 — Nikotinik asit dietilamit
2933.39.99.00.14 — Mezoinozidol hekzonikotinad
2933.39.99.00.15 — Tenaldin
2933.39.99.00.16 — 3-Quinüklidinil benzilat
2933.39.99.00.17 — Norfentanil
2933.39.99.00.22 — Tropikamid
2933.39.99.00.23 — Alphaprodine
2933.39.99.00.24 — Pethidine intermediate B
2933.39.99.00.25 — Pethidine intermediate C
2933.39.99.00.26 — Phenazocine
2933.39.99.00.27 — Trihexyphenidyl (INN)
2933.39.99.00.28 — Biperiden (INN)
2933.39.99.00.39 — Diğerleri

2933.41 — Heterocyclic compounds; containing a quinoline or isoquinoline ring-system (whether or not hydrogenated) in the structure, not further fused, levorphanol (INN) and its salts

2933.41.00.00.11 — Levorfanol (INN)
2933.41.00.00.12 — Levorfanolun tuzları

2933.49 — Heterocyclic compounds; containing a quinoline or isoquinoline ring-system (whether or not hydrogenated) in the structure, not further fused, other than levorphanol (INN) and its salts

2933.49.10.00.11 — Diiyodhidroksi -8- kinolin
2933.49.10.00.12 — İyodklorhidrokin (5-klor-8-hidroksi-7-iyodkinolin- )
2933.49.10.00.19 — Kinolinin diğer halojen türevleri
2933.49.10.00.21 — Kinolinin karboksilik asit türevleri
2933.49.30.00.00 — Dekstrometorfan (INN) ve tuzları
2933.49.90.00.11 — Kinolin
2933.49.90.00.12 — İzokinolin
2933.49.90.00.13 — Metilkinolin
2933.49.90.00.14 — İzobutilkinolin
2933.49.90.00.15 — İzopropilkinolin
2933.49.90.00.16 — Tetrametilhidrokinolin
2933.49.90.00.18 — Oktaverin
2933.49.90.00.21 — 6,7-dimetoksi-1-(3,4,5-trietoksifenil) izokinolin
2933.49.90.00.29 — Diğerleri

2933.53 — Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof

2933.53.10.00.11 — Fenobarbital (INN)
2933.53.10.00.12 — Fenobarbital sodyum tuzu
2933.53.10.00.19 — Fenobarbitalin diğer tuzları
2933.53.10.00.21 — Barbital (INN)
2933.53.10.00.22 — Barbitalin tuzları
2933.53.90.00.11 — Butabarbital (INN)
2933.53.90.00.12 — Pentobarbital (INN)
2933.53.90.00.13 — Allobarbital (5,5-diallilbarbutirik asit)
2933.53.90.00.14 — Amobarbital (INN)
2933.53.90.00.15 — Siklobarbital (INN)
2933.53.90.00.16 — Metilfenobarbital (INN)
2933.53.90.00.17 — Sekbutabarbital (INN)
2933.53.90.00.18 — Sekobarbital (INN)
2933.53.90.00.21 — Vinilbital (INN)
2933.53.90.00.22 — Butalbital(INN)
2933.53.90.00.29 — Diğerleri

2933.54 — Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, other derivatives of malonylurea (barbituric acid) and salts thereof, n.e.c. in 2933.53

2933.54.00.00.12 — Mephobarbital (Prominal) (INN)
2933.54.00.00.13 — Methobarbital (Metil amino) (INN)
2933.54.00.00.14 — Proxibarbal (INN)
2933.54.00.00.19 — Diğerleri

2933.55 — Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure; loprazolam (INN), mecloqualone (INN), methaqualone (INN), and zipeprol (INN); salts thereof

2933.55.00.00.11 — Loprazolam (INN)
2933.55.00.00.12 — Zipeprol (INN)
2933.55.00.00.13 — Meklokualon (INN)
2933.55.00.00.14 — Metakualon (INN)
2933.55.00.00.19 — Diğerleri

2933.59 — Heterocyclic compounds; containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure, (other than malonylurea and its derivatives, loprazolam, mecloqualone, methaqualone, zipeprol, and salts thereof) n.e.c. in 2933.5

2933.59.10.00.00 — Diazinon (ISO)
2933.59.20.00.00 — 1,4 - Diazabisiklo (2,2,2) oktan (trietilendiamin)
2933.59.95.00.11 — Piperazin (dietilendiamin)
2933.59.95.00.12 — Piperazin hekzahidrat
2933.59.95.00.13 — Piperazin hidroklorür
2933.59.95.00.14 — Piperazin fosfat
2933.59.95.00.15 — Piperazin adipat
2933.59.95.00.16 — Piperazin sitrat
2933.59.95.00.17 — Piperazin kalsiyum edatat
2933.59.95.00.18 — Piperazin tartarat
2933.59.95.00.21 — 1-Amino-4-metilpiperazin
2933.59.95.00.22 — 2,5-Dimetil piperazin
2933.59.95.00.23 — BZP (1-benzylpiperazine)
2933.59.95.00.24 — 1-(2 3-dichlorophenyl) piperazine
2933.59.95.00.28 — Piperazinin diğer tuz ve türevleri
2933.59.95.00.31 — Siprofloksasin
2933.59.95.00.32 — Pyrazophos
2933.59.95.00.33 — Thiopental Na (INN)
2933.59.95.00.34 — Buspiron (INN)
2933.59.95.00.38 — Diğerleri

2933.69 — Heterocyclic compounds; containing an unfused triazine ring (whether or not hydrogenated) in the structure, others excluding melamine

2933.69.10.10.00 — Hekzojen (trimetilentrinitramin)
2933.69.10.90.11 — Atrazin
2933.69.10.90.12 — Propazin
2933.69.10.90.13 — Simazin
2933.69.40.10.00 — Metanamin (INN) (hekzametilentetramin)
2933.69.40.20.00 — 2,6- Di-tert-butil-4- [4,6-bis (oktiltiyo)-1,3,5-triazi-2-ylamino] fenol
2933.69.80.00.11 — Siyanürik asit
2933.69.80.00.19 — Diğerleri

2933.72 — Heterocyclic compounds; lactams; clobazam (INN) and methyprylon (INN)

2933.72.00.00.11 — Klobazam (INN)
2933.72.00.00.12 — Metiprilon (INN)

2933.79 — Heterocyclic compounds; lactams; other than 6-hexanelactam (epsilon caprolactam) and clobazam (INN) and methyprylon (INN)

2933.79.00.00.11 — İzatin
2933.79.00.00.12 — 2-Hidroksikinolin (karbostiril)
2933.79.00.00.13 — Zopiklon (INN)
2933.79.00.00.19 — Diğer laktamlar

2933.91 — Heterocyclic compounds; alprazolam (INN), camazepam (INN), chlordiazepoxide (INN), clonazepam (INN), clorazepate, delorazepam (INN), diazepam (INN), estazolam (INN), ethyl loflazepate (INN), fludiazepam (INN), flunitrazepam (INN), (cont)

2933.91.10.00.00 — Klordiazepoksit (INN)
2933.91.90.00.11 — Alprazolam (INN)
2933.91.90.00.12 — Camazepam (INN)
2933.91.90.00.13 — Klonezepam(INN)
2933.91.90.00.14 — Klorazepate
2933.91.90.00.15 — Delorazepam (INN)
2933.91.90.00.16 — Diazepam (INN)
2933.91.90.00.17 — Estazolam (INN)
2933.91.90.00.18 — Etil loflazepate (INN)
2933.91.90.00.21 — Fludiazepam (INN)
2933.91.90.00.22 — Flunitrazepam (INN)
2933.91.90.00.23 — Flurazepam (INN)
2933.91.90.00.24 — Halazepam (INN)
2933.91.90.00.25 — Lorazepam (INN)
2933.91.90.00.26 — Lormetazepam (INN)
2933.91.90.00.27 — Mazindol (INN)
2933.91.90.00.28 — Medazepam (INN)
2933.91.90.00.31 — Midazolam (INN)
2933.91.90.00.32 — Nimetazepam (INN)
2933.91.90.00.33 — Pinazepam (INN)
2933.91.90.00.34 — Prazepam (INN)
2933.91.90.00.35 — Provaleron (INN)
2933.91.90.00.36 — Temazepam (INN)
2933.91.90.00.37 — Tetrazepam (INN)
2933.91.90.00.38 — Triazolam (INN)
2933.91.90.00.41 — Nitrazepam (INN)
2933.91.90.00.42 — Nordazepam (INN)
2933.91.90.00.43 — Okzazepam (INN)

2933.99 — Heterocyclic compounds; n.e.c. in headings no. 2933

2933.99.20.10.11 — İndol ve tuzları
2933.99.20.10.12 — Skatol ve tuzları
2933.99.20.90.11 — Azepetin ve tuzları
2933.99.20.90.12 — Fenindamin ve tuzları
2933.99.20.90.13 — İmipramin hidroklorür
2933.99.20.90.19 — Diğerleri
2933.99.50.00.00 — 2,4-Di-tert-butil-6-(5-klorbenzotriazol-2-yl) fenol
2933.99.80.10.00 — Benzimidazol-2-tiol (merkaptobenzimidazol )
2933.99.80.90.14 — Monoazepinler
2933.99.80.90.15 — Diazepinler
2933.99.80.90.17 — WY 3185 (Okzazepam intermedia)
2933.99.80.90.18 — WY 4088 (Propozepam intermedia)
2933.99.80.90.21 — İndolasetik asit
2933.99.80.90.22 — İndolbutirik asit
2933.99.80.90.23 — Akridin ve türevleri
2933.99.80.90.24 — Karbazol ve türevleri
2933.99.80.90.25 — Azosinler (doymuş olsun olmasın)
2933.99.80.90.27 — Tenocyclidine (INN)
2933.99.80.90.31 — Chloramino Ketone
2933.99.80.90.32 — Delta 9-Tetra hydrocannabinol
2933.99.80.90.33 — Rolicyclidine (INN)
2933.99.80.90.34 — Etrytamine (INN)
2933.99.80.90.35 — Zolpidem tartrate
2933.99.80.90.36 — Azinphos-ethyl
2933.99.80.90.37 — Chlorfenapyr
2933.99.80.90.38 — Maleic hidrazin
2933.99.80.90.41 — Tris-aziridinyl-phosphinoxide
2933.99.80.90.43 — Benzidamin
2933.99.80.90.44 — Benzidamin hidroklorür
2933.99.80.90.45 — Triptofan
2933.99.80.90.49 — Diğerleri

2933.34

2933.34.00.00.00 — Diğer fentaniller ve türevleri

2933.35

2933.35.00.00.00 — 3-Kuinüklidinol

2933.36

2933.36.00.00.00 — 4-Anilin-N-fenetilpiperidin (ANPP)

2933.37

2933.37.00.00.00 — N-Fenetil-4-piperidon (NPP)

2933.52

2933.52.00.00.00 — Malonil üre (barbutirik asit) ve tuzları

2933.61

2933.61.00.00.00 — Melamin

2933.71

2933.71.00.00.00 — Epsilon -kaprolaktam (6 -hekzanelaktam)

2933.92

2933.92.00.00.00 — Azinfos-metil (ISO)

Türkiye import duty rates under this heading

The ranges below are the rates Türkiye applies on import, compiled from the import regime rows registered against the 211 codes under this heading. The HS code itself is identical in every country down to six digits; only these rates and the twelve-digit breakdown are Türkiye's. A range is always calculated within a single column; different country groups are never mixed. The rate that applies to you depends on both the twelve-digit code and the country of origin — open the specific code for the exact value.

These are the columns of Türkiye's Import Regime Decree: in the industrial-goods list and the additional-duty table the columns are published by number: 1 = EU members and free trade agreement partners, 2 = Qatar, 3 = United Arab Emirates, 4-5-6 = Generalised System of Preferences groups (least developed, special incentive, developing), 7 = all other countries. A preferential column only applies where a valid proof of origin is filed.

The rate becomes an amount as follows: customs duty = customs value (price of the goods + freight to the Turkish border + insurance) × rate. The additional customs duty applies to the same base, not on top of the customs duty. VAT is calculated last, on the customs value plus every tax paid at customs plus the costs incurred up to registration of the declaration.

Customs duty — list column 1 — 0%
Customs duty — list column 2 — 0%
Customs duty — list column 3 — 0%
Customs duty — list column 4 — 0%
Customs duty — list column 5 — 0%
Customs duty — list column 6 — 0% – 3%
Customs duty — list column 7 — 0% – 6.5%
Customs duty — source — Annex to the Import Regime Decree, 2026 · List II

Which subcode you pick changes the duty you pay

The 223 import regime rows under this heading do not carry the same rate. The bands below are the values in list column 7; confirm which row governs your goods before you settle on a twelve-digit code.

The same split also appears in these columns: list column 6.

0% — duty rows: 35 — 2933.11.10.00.00 Propifenazon (INN); 2933.19.10.00.00 Fenilbutazon (INN); 2933.29.10.00.11 Nafazolin hidroklorür ve nafazolin nitrat; 2933.29.10.00.12 Pentalamin; 2933.29.10.00.13 Tolazolin hidroklorür; 2933.39.10.00.11 İproniazit; +29 more at this rate
4% — duty rows: 1 — 2933.39.50.00.00 Floroksipir (ISO), metil ester
5.3% — duty rows: 4 — 2933.31.00.10.00 Piridin karboksilik asit (izonikotinik asit); 2933.31.00.90.11 Piridin; 2933.31.00.90.12 Piridin hidroklorür; 2933.31.00.90.19 Piridinin diğer tuzları
5.5% — duty rows: 14 — 2933.49.10.00.11 Diiyodhidroksi -8- kinolin; 2933.49.10.00.12 İyodklorhidrokin (5-klor-8-hidroksi-7-iyodkinolin- ); 2933.49.10.00.19 Kinolinin diğer halojen türevleri; 2933.49.10.00.21 Kinolinin karboksilik asit türevleri; 2933.69.10.10.00 Hekzojen (trimetilentrinitramin); 2933.69.10.90.11 Atrazin; +8 more at this rate
6.5% — duty rows: 157 — 2933.11.90.00.11 Fenazon (antiprin); 2933.11.90.00.12 Dimetil dimetilamino fenil pirazolan (amidoprin); 2933.11.90.00.19 Diğerleri; 2933.19.90.00.11 1-Fenil-3-pirazolidon; 2933.19.90.00.19 Diğerleri; 2933.21.00.00.11 Hidantoin; +151 more at this rate

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