Other

Other heterocyclic compounds with nitrogen heteroatoms only

NDPS CLEARANCE

HSN 2933 39 90 covers residual nitrogen-heteroatom heterocyclic compounds and is subject to Narcotic Drugs and Psychotropic Substances (NDPS) Narcotics Commissioner oversight under the NDPS (Regulation of Controlled Substances) Order and the NDPS Rules, 1985, for substances classified as controlled or narcotic. A Minimum Import Price (MIP) restriction applies to ATS-8 under DGFT Notification 30/2025-26 until 30 September 2026, and mandatory Chapter 29 qualifiers are required under CBIC Circular 23/2023-Cus with effect from 15 October 2023.

What this is

HSN code

2933 39 90

Chapter

29 · Organic chemicals

Primary regulator

NDPS · NDPS (Regulation of Controlled Substances) Order; NDPS Rules, 1985

Customs documentation

NOC from Narcotics Commissioner
Import certificate from NDPS
Registration certificate from CDSCO

Applicable Partner Government Agencies

NDPSNDPS·Narcotics Control Bureau

Procedural directions for customs clearance are issued by: Directorate General of Foreign Trade, Central Board of Indirect Taxes and Customs.

Compliance steps

1
Identify whether the specific substance in the consignment is a controlled substance under the NDPS (Regulation of Controlled Substances) Order. For the nine named MDP-2-P glycidic acid esters, 4-piperidone, 1-Boc-4-piperidone, ANPP, and NPP, a consignment-specific NOC from the Narcotics Commissioner is mandatory before import; absence of the NOC renders the consignment liable to seizure and prosecution.
NDPS (Regulation of Controlled Substances) Amendment Order, 2025 · GSR 71(E) dated 23-01-2025 · NDPS (Regulation of Controlled Substances) Order dated 26-03-2013
2
Upload all mandatory e-Sanchit documents at the bill of entry before seeking out-of-charge: Certificate of Analysis – Drug (0010dc), Batch Release Certificate (0030dc), Label of Consignment (0110dc), Registration Certificate (Drugs) (101dc1), and Import Licence for Drugs (9111dc). For NDPS substances imported for medical or scientific use, the import certificate under Chapter VII-A of the NDPS Rules, 1985 is additionally required.
NDPS Rules, 1985, Chapter VII-A · ITC (HS) Policy condition 2 to Chapter 29 · CBIC Circular 23/2023-Cus dated 30-09-2023
3
Comply with the Chapter 29 mandatory additional qualifiers in the import declaration as stipulated in Para 4.1 and 4.2 of CBIC Circular 23/2023-Cus, operative with effect from 15 October 2023. For ATS-8 specifically, confirm the CIF value is at or above US$ 111 per kilogram unless importing as an Advance Authorisation holder, EOU, or SEZ unit with a documented undertaking against DTA sale.
CBIC Circular 23/2023-Cus dated 30-09-2023 · DGFT Notification 30/2025-26 dated 18-09-2025

A word of counsel

The most common error on this tariff line is treating the overall 'Free' import status of CTI 2933 39 90 as conclusive and overlooking the substance-specific controlled-substance overlays that impose an absolute prohibition absent a Narcotics Commissioner NOC. A consignment of any of the nine listed MDP-2-P glycidic acid esters or piperidone derivatives arriving without a consignment-specific NOC is not a documentation deficiency amenable to post-arrival cure — it is a prohibited import liable to confiscation and criminal liability under the NDPS Act. Verify the CAS number of each imported substance against the current controlled-substance schedules before placing the purchase order.

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Frequently asked

Does HSN 2933 39 90 require BIS certification?

No, this tariff line is not covered by any BIS Quality Control Order. Import is governed by the Narcotics Commissioner under the NDPS (Regulation of Controlled Substances) Order for controlled substances, with DGFT administering the ITC (HS) policy conditions and an MIP condition on ATS-8 until 30 September 2026.

Which specific substances under this CTI require a consignment-specific NOC from the Narcotics Commissioner?

The nine MDP-2-P methyl glycidic acid esters (ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, and tert-butyl esters), 4-piperidone, 1-Boc-4-piperidone, ANPP, and NPP all require a consignment-specific NOC; BZ (3-quinuclidinyl benzilate) is additionally restricted to imports from state parties to the Chemical Weapons Convention.

Does the MIP exemption for Advance Authorisation holders apply unconditionally?

No. AA holders, EOUs, and SEZ units are exempt from the MIP condition on ATS-8 only on the condition that imported inputs are not sold into the Domestic Tariff Area; a DTA diversion triggers retrospective MIP enforcement under DGFT Notification 30/2025-26.

Last verified against gazette notifications: 2026-05-16. Source: NDPS / DGFT / CBIC / Indian Customs CUSDATA.