Next dueGST
11 OCTGSTR-1 · Outward supplies · Sep 2026in 6 days 13 OCTGSTR-1 (QRMP) · Quarterly return · Jul–Sep 2026in 8 days 18 OCTCMP-08 · Composition payment · Jul–Sep 2026in 13 days 20 OCTGSTR-3B · Summary return · Sep 2026in 15 days 22 OCTGSTR-3B (QRMP) · Quarterly return · Jul–Sep 2026 · 22nd or 24th by statein 17 days 13 NOVIFF (QRMP) · B2B invoices · Oct 2026in 39 days 7 OCTTDS / TCS deposit · Deducted in Sep 2026in 2 days 15 OCTPF & ESI · Contributions · Sep 2026in 10 days
All due dates

HSN Code 2933: Heterocyclic compounds with nitrogen hetero-atom

HSN 2933 covers heterocyclic compounds with nitrogen hetero-atom. Notification 9/2025-Central Tax (Rate) names this heading in 2 entries, at 5% / 18%. The basic customs duty in the Customs Tariff is 5% / 7.5%. Export policy: Free; RoDTEP 0.7–0.9% of FOB value. The heading has 102 eight-digit tariff items.

Checked against the official files on 2 October 2026102 tariff itemsChapter 29 · Organic chemicals
GST rate5% / 18%

The heading is named in 2 entries. The description of the goods decides the rate.

Notfn 9/2025-CT (Rate) · 2 entries
Basic customs duty5% / 7.5%

Differs by tariff item: see the table. Includes the Finance Act 2025 and 2026 changes.

Customs Tariff · First Schedule · Ch. 29
Import policyCheck Schedule 1

The item-wise import policy line is not shown on this page.

ITC(HS) 2022 · Schedule 1
Export policy · RoDTEPFree · 0.7–0.9%

No export authorisation needed for any line. RoDTEP continues up to 31 December 2026.

Sch. 2 Export Policy · Appendix 4R
Tariff items

All 8-Digit Codes Under HSN 2933

Classify the goods at eight digits before you quote a rate: the duty, the export policy and the RoDTEP rate are fixed line by line. Heading text: Heterocyclic compounds with nitrogen hetero-atom(s) only.

Tariff itemDescriptionBasic customs dutyExport policyRoDTEP
2933 11 00Phenazone (antipyrin) and its derivates7.5%Free0.7%
2933 19 103-carboxy (para sulpho-phenyl)-5- pyrazoloneOther7.5%Free0.7%
2933 19 201 (2,5- dichloro-4-sulpho phenyl)-3-methyl- 5-pyrazoloneOther7.5%Free0.7%
2933 19 303-methyl-1(4-sulpho-O-toluyl-5-pyrazolone)Other7.5%Free0.7%
2933 19 40PhenylmethylpyrazoloneOther7.5%Free0.7%
2933 19 501-phenyl-5-pyrazolone-3-carboxylic acid ethylesterOther7.5%Free0.7%
2933 19 601-(m-sulphophenyl)-3-pyrazoloneOther7.5%Free0.7%
2933 19 70AnalginOther7.5%Free0.7%
2933 19 80OxyphenbutazoneOther7.5%Free0.7%
2933 19 91Fluoro-3-(difluoromethyl)-1-methyl-1h-pyrazole-4- carbonyl fluorideOther7.5%Free0.7%
2933 19 92Goods specified in Supplementary Note 11 to this Chapter7.5%Finance Act 2025——
2933 19 99OtherOther7.5%Free0.7%
2933 21 00Hydantoin and its derivatives7.5%Free0.7%
2933 29 10TinidazoleOther7.5%Free0.7%
2933 29 20Metronidazole, metronidiazole benzoateOther7.5%Free0.7%
2933 29 30MebendazoleOther7.5%Free0.7%
2933 29 40DimetridazoleOther7.5%Free0.7%
2933 29 50AlbendazoleOther7.5%Free0.7%
2933 29 60Imidacloprid (ISO)Other7.5%Free0.7%
2933 29 90OtherOther7.5%Free0.7%
2933 31 10Goods specified in Supplementary Note 13 to this Chapter7.5%Finance Act 2025——
2933 31 90Other7.5%Finance Act 2025——
2933 32 20Piperidine7.5%Finance Act 2026——
2933 32 30Mepiquate chloride7.5%Finance Act 2026——
2933 32 90Other7.5%Finance Act 2025——
2933 33 11Alfentanil (INN) and its saltAlfentanil (INN), anileridine (INN), bezitramide (INN),bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN)…7.5%Free0.7%
2933 33 12Anileridine (INN) and its saltAlfentanil (INN), anileridine (INN), bezitramide (INN),bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN)…7.5%Free0.7%
2933 33 13Bezitramide (INN) and its saltAlfentanil (INN), anileridine (INN), bezitramide (INN),bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN)…7.5%Free0.7%
2933 33 14Bromazepam (INN) and its saltAlfentanil (INN), anileridine (INN), bezitramide (INN),bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN)…7.5%Free0.7%
2933 33 15Carfentanil (INN) and its saltAlfentanil (INN), anileridine (INN), bezitramide (INN),bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN)…7.5%Free0.7%
2933 33 16Difenoxin (INN) and its saltAlfentanil (INN), anileridine (INN), bezitramide (INN),bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN)…7.5%Free0.7%
2933 33 17Diphenoxylate (INN) and its saltAlfentanil (INN), anileridine (INN), bezitramide (INN),bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN)…7.5%Free0.7%
2933 33 18Dipipanone (INN) and its saltAlfentanil (INN), anileridine (INN), bezitramide (INN),bromazepam (INN), carfentanil (INN), difenoxin (INN), diphenoxylate (INN)…7.5%Free0.7%
2933 33 21Fentanyl (INN) and its saltFentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A…7.5%Free0.7%
2933 33 22Ketobemidone (INN) and its saltFentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A…7.5%Free0.7%
2933 33 23Methylphenidate (INN) and its saltFentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A…7.5%Free0.7%
2933 33 24Pentazocine (INN) and its saltFentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A…7.5%Free0.7%
2933 33 25Pethidine (INN) and its saltFentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A…7.5%Free0.7%
2933 33 26Pethidine (INN) intermediate A and its saltFentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A…7.5%Free0.7%
2933 33 27Phencyclidine (INN) (PCP) and its saltFentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A…7.5%Free0.7%
2933 33 28Phenoperidine (INN) and its saltFentanyl (INN), ketobemidone (INN), methylphenidate (INN), pentazocine (INN), pethidine (INN), pethidine (INN) intermediate A…7.5%Free0.7%
2933 33 31Pipradrol (INN) and its saltPipradrol (INN), piritramide (INN), propiram (INN), remifentanil (INN) and trimeperidine (INN); salts thereof7.5%Free0.7%
2933 33 32Piritramide (INN) and its saltPipradrol (INN), piritramide (INN), propiram (INN), remifentanil (INN) and trimeperidine (INN); salts thereof7.5%Free0.7%
2933 33 33Propiram (INN) and its saltPipradrol (INN), piritramide (INN), propiram (INN), remifentanil (INN) and trimeperidine (INN); salts thereof7.5%Free0.7%
2933 33 34Remifentanil (INN) and its saltPipradrol (INN), piritramide (INN), propiram (INN), remifentanil (INN) and trimeperidine (INN); salts thereof7.5%Free0.7%
2933 33 35Trimeperidine (INN) and its saltPipradrol (INN), piritramide (INN), propiram (INN), remifentanil (INN) and trimeperidine (INN); salts thereof7.5%Free0.7%
2933 34 00Other fentanyls and their derivatives7.5%Free0.7%
2933 35 003-Quinuclidinol7.5%Free0.7%
2933 36 004-Anilino-N-phenethylpiperidine (ANPP)7.5%Free0.7%
2933 37 00N-Phenethy 1-4-piperidone (NPP)7.5%Free0.7%
2933 39 11Amino pyridineDerivatives of pyridine7.5%Free0.8%
2933 39 12Alpha picoline (2-methyl pyridine)Derivatives of pyridine7.5%Free0.8%
2933 39 13Gamma picoline (4-methyl pyridine)Derivatives of pyridine7.5%Free0.8%
2933 39 14Chloropheniramine maleateDerivatives of pyridine7.5%Free0.8%
2933 39 15Diphenoxylate hydrochlorideDerivatives of pyridine7.5%Free0.8%
2933 39 16Beta picoline (3-methyl pyridine)Derivatives of pyridine7.5%Free0.8%
2933 39 17Chlorantraniliprole (ISO)Derivatives of pyridine7.5%Free0.8%
2933 39 18Lutidine (Dimethyl Pyridine)Derivatives of pyridine7.5%Free0.8%
2933 39 21Acetamiprid (ISO)Derivatives of pyridine7.5%Free0.8%
2933 39 22Imazethapyr (ISO)Derivatives of pyridine7.5%Free0.8%
2933 39 23Goods specified in Supplementary Note 14 to this Chapter7.5%Finance Act 2025——
2933 39 29OtherDerivatives of pyridine7.5%Free0.8%
2933 39 40Benzene acetic acid, alpha -hydroxy- alpha-phenyl, 1- azabicyclo-azabicyclo [2.2.2.] oct-3-yl esterDerivatives of pyridine7.5%Free0.8%
2933 39 501-[N,N-Dialkyl (≤C10)-N-(n-(hydroxyl, cyano, acetoxy)alkyl (≤C10)) ammonio]-n-[N-(3- dimethylcarbamoxy-α-picolinyl)-N,N-dialkyl7.5%Finance Act 2025——
2933 39 601,n-Bis[N-(3-dimethylcarbamoxy-a-picolyl)- N,N-dialkyl (≤C10) ammonio]-alkane-(2,7.5%Finance Act 2025——
2933 39 704-Piperidone7.5%Finance Act 2026——
2933 39 801-Boc-4-piperidone7.5%Finance Act 2026——
2933 39 91Norfentanyl7.5%Finance Act 2026——
2933 39 99Other7.5%Finance Act 2026——
2933 41 10Fenazaquin7.5%Finance Act 2025——
2933 41 90Other7.5%Finance Act 2025——
2933 49 10Quizalofop ethyl7.5%Finance Act 2025——
2933 49 90Other7.5%Finance Act 2025——
2933 52 00Malonylurea (barbituric acid) and its salts7.5%Free0.7%
2933 53 00Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital (INN), cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), secbutabarbital (INN), phenobarbital (INN), ] secobarbital (INN), and vinylbital (INN); salts thereof7.5%Free0.7%
2933 54 00Other derivatives of malonylurea (barbituric acid); salts thereof7.5%Free0.7%
2933 55 00Loprazolam (INN), mecloqualone (INN), methaqualone (INN) and zipeprol (INN); salts thereof7.5%Free0.7%
2933 59 10Aminophylline (cordophylin)Other7.5%Finance Act 2025Free0.8%
2933 59 20TrimethoprimOther7.5%Finance Act 2025Free0.8%
2933 59 30Diethyl carbamazine citrateOther7.5%Finance Act 2025Free0.8%
2933 59 401-Amino-4-Methyl piperazineOther7.5%Finance Act 2025Free0.8%
2933 59 50Bispyribac-sodium (ISO)Other7.5%Finance Act 2025Free0.8%
2933 59 90OtherOther7.5%Finance Act 2025Free0.8%
2933 61 00Melamine7.5%Free0.7%
2933 69 10Cyanuric acid and its saltsOther7.5%Free0.7%
2933 69 204-[4,6-bis(2,4-dimethylphenyl)-1,3,5- triazine-2-yl]-1,3-benzenediolOther7.5%Free0.7%
2933 69 30Tris(2-hydroxyethyl) isocyanurateOther7.5%Free0.7%
2933 69 40EthylhexyltriazoneOther7.5%Free0.7%
2933 69 502,4,6-tri(2,4-dyhydroxyl-3-methylphenyl)-1,3,5-triazineOther7.5%Free0.7%
2933 69 60Goods specified in Supplementary Note 16 to this Chapter7.5%Finance Act 2025——
2933 69 90OtherOther7.5%Free0.7%
2933 71 006-Hexanelactam (epsilon-caprolactam)5%Free0.9%
2933 72 00Clobazam (INN) and methyprylon (INN)7.5%Free0.9%
2933 79 10N-methyl-2-pyrrolidoneOther lactams7.5%Free0.9%
2933 79 20N-ethyl-2-pyrrolidoneOther lactams7.5%Free0.9%
2933 79 30Spirotetramat7.5%Finance Act 2025——
2933 79 90OtherOther lactams7.5%Free0.9%
2933 91 00Alprazolam (INN), camazepam (INN) chloridiazepoxide (INN), clonazepam (INN), clorazepate, delorazepam (INN), diazepam (INN), estazolam (INN), ethyl loflazepate (INN), fludiazepam (INN), flunitrzepam (INN), flurazepam (INN), halazepam (INN), lorazepam (INN), lormetazepam (INN), mazindol (INN), medazepam (INN), midazolam (INN), nimetazepam (INN), nitrazepam (INN), nordazepam (INN), oxazepam (INN), pinazepam (INN), prazepam (INN), pyrovalerone (INN), tamazepam (INN), tetrazepam (INN) and triazolam (INN); salts thereof7.5%Free0.7%
2933 92 00Azinphos-methyl (ISO)7.5%Free0.7%
2933 99 10Imidazo pyridine methyl amineOther7.5%Free0.7%
2933 99 20Carbendazim (ISO)Other7.5%Free0.7%
2933 99 90OtherOther7.5%Free0.7%

Basic customs duty is the standard rate in the First Schedule to the Customs Tariff Act. An exemption notification or a trade agreement can lower the duty actually payable. RoDTEP is a percentage of FOB value for exports from the domestic tariff area.

GST

GST Rate on HSN 2933

GST on goods is fixed by the entries of Notification No. 9/2025-Central Tax (Rate), in force from 22 September 2025 and amended up to 30 April 2026. The rate shown is the total: half is central tax and half is State tax on a sale within a State, and the whole is charged as IGST on an inter-State sale or an import. Read the description in the entry, not only the code: the same heading can sit in two Schedules.

GST rateEntryCodes namedGoods covered by the entry
5%Schedule I, S. No. 22229 or 3808 93Gibberellic acid (chapter-wide entry)
18%Schedule II, S. No. 3629All organic chemicals other than giberellic acid (chapter-wide entry)
18%Schedule II, S. No. 639Any ChapterGoods which are not specified in Schedule I, III, IV, V, VI or VII (residual entry)

Goods of this heading that fall under no specific entry take the residual entry, unless they are exempt under the exemption notification issued with the rate notification.

Import

Customs Duty on HSN 2933

An import pays three things: basic customs duty at the tariff rate, social welfare surcharge at 10% of that duty (unless exempted for the goods), and IGST at the GST rate on the value plus both duties. A registered importer takes credit of the IGST.

Basic customs duty at
Social welfare surcharge, 10% of the duty
IGST at on value plus both
Total duty and tax
As a share of the value

Standard rates only: no exemption notification, anti-dumping or safeguard duty, or trade-agreement rate is applied, and the surcharge is taken at 10% although some goods are exempted from it. A registered importer takes credit of the IGST.

Duty changed by the Finance Act 2025, 2026

One or more tariff lines of this heading were substituted by the Finance Act 2025 and 2026. The table above already shows the amended rate for those lines.

Whether an import is Free, Restricted or Prohibited is set line by line in ITC(HS) Schedule 1 (Import Policy), read with its General Notes on standards, quarantine and packaging. That policy line is not reproduced on this page; check it before you place the order.

Export

Export Policy and RoDTEP for HSN 2933

Under Schedule 2 of ITC(HS) 2022 the 102 tariff items are marked: 83 Free, 19 not shown in the Schedule text. “Free” means no export authorisation is needed; a Restricted item needs one from DGFT, and an STE item moves only through the named State trading enterprise.

RoDTEP is notified for 83 of the 102 tariff items, at 0.7–0.9% of FOB value (Appendix 4R, for exports from the domestic tariff area). The scheme continues up to 31 December 2026 at the rates in force on 30 September 2026.

The rate was cut by half for one month in 2026 and then restored. A shipping bill dated from 23 February to 22 March 2026 carries the reduced rate.

  1. Current RoDTEP schedule takes effectAppendix 4R and 4RE notified by Notification 32/2024-25.
  2. All rates and caps limited to 50%Notification 60/2025-26, with immediate effect.
  3. Full rates restoredNotification 66/2025-26 and its corrigendum: the rates of 22 February 2026 apply again from 23 March.
  4. Scheme continued to 30 September 2026Notification 74/2025-26, rates unchanged.
  5. Scheme continued to 31 December 2026Notification 41/2026-27: rates and caps as on 30 September 2026 continue.
Not shown on this page
  • The item-wise import policy (Free, Restricted or Prohibited) of ITC(HS) Schedule 1. Check it before you place an order.
  • Exemption notifications, anti-dumping and safeguard duties, and preferential rates under trade agreements. The duty shown is the tariff rate.
  • The GST exemption notification. Goods exempt under it pay no GST even if the heading is named in a rate entry.

Official documents behind this page

  1. Notification No. 9/2025-Central Tax (Rate), 17 September 2025GST rate Schedules I to VI, in force from 22 September 2025, as amended by Notification No. 19/2025-Central Tax (Rate) of 31 December 2025 (Schedule VII omitted from 1 February 2026) and No. 01/2026 of 30 April 2026.
  2. Customs Tariff, First ScheduleCBIC Customs Tariff as on 30 June 2024, with the First Schedule amendments of the Finance (No. 2) Act, 2024, the Finance Act, 2025 and the Finance Act, 2026 applied.
  3. ITC(HS) 2022, Schedule 2, Export PolicyDGFT: the export policy and policy condition of each tariff item.
  4. Appendix 4R and Appendix 4RE, RoDTEP ScheduleDGFT, with effect from 10 October 2024 (Notification No. 32/2024-25); the 2026 changes are in Notifications 60, 66 and 74 of 2025-26 and 41 of 2026-27.

Disclaimer: This guide is general information based on the law and notifications in force when it was last updated. It is not professional advice for your case — rates, thresholds and due dates change, so check the current position with the official source before you act on it.

People also ask

Questions, answered

Short, direct answers to the 5 questions readers ask most on this topic.

Notification No. 9/2025-Central Tax (Rate), in force from 22 September 2025, names heading 2933 at 5% / 18%. The rate depends on the description in the entry, so match your goods to the entry before invoicing. Goods of the heading not covered by a specific entry take the residual 18% entry unless exempt.

The basic customs duty in the First Schedule to the Customs Tariff Act is 5% / 7.5%. Social welfare surcharge at 10% of the basic duty and IGST at the GST rate are added on import. An exemption notification or a trade agreement can reduce the duty actually payable.

Under ITC(HS) 2022, Schedule 2, the tariff items of heading 2933 are marked: 83 Free, 19 not shown in the Schedule text. Free items need no export authorisation. Restricted items need an authorisation from DGFT, and prohibited items cannot be exported.

Appendix 4R lists 83 tariff items of heading 2933 at 0.7–0.9% of FOB value. The RoDTEP scheme continues up to 31 December 2026 under DGFT Notification No. 41/2026-27.

Heading 2933 has 102 eight-digit tariff items in the Customs Tariff, from 2933 11 00 to 2933 99 90. GST returns and shipping documents use these eight-digit codes.