Naphthionic acid (1-naphthylamine-4-sulphonic acid)

Naphthionic acid, naphthylamine sulphonic acid derivatives

CIB&RC CLEARANCE · NDPS CLEARANCE

HSN 2921 45 31 (Naphthionic acid) is subject to Central Insecticides Board and Registration Committee (CIB&RC) registration and import permit under the Insecticides Act, 1968, where the substance appears in the Schedule to that Act, with import restricted to notified places under Rule 45 of the Insecticides Rules, 1971. Narcotic Drugs and Psychotropic Substances (NDPS) import-certificate requirements under Chapter VII-A of the NDPS Rules, 1985, and Chemical Weapons Convention (CWC) appendix controls administered through the Directorate General of Foreign Trade (DGFT) ITC (HS) policy apply as additional clearance requirements.

What this is

HSN code

2921 45 31

Chapter

29 · Organic chemicals

Primary regulator

CIB&RC · Insecticides Act, 1968; Insecticides Rules, 1971

Customs documentation

Registration and permit from CIB&RC
Import certificate from NDPS
Chapter 29 qualifiers from CBIC

Applicable Partner Government Agencies

CIB&RCCIB&RC·Central Insecticides Board and Registration Committee

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
Confirm whether the specific substance under this CTI appears in the Schedule to the Insecticides Act, 1968. If scheduled, obtain registration and an import permit from the Secretariat of CIB&RC before dispatch, and ensure import is routed only through places notified under Rule 45 of the Insecticides Rules, 1971.
Insecticides Act, 1968 · Rule 45 of the Insecticides Rules, 1971
2
If the substance qualifies as an NDPS substance, obtain an import certificate under Rule 53 of the NDPS Rules, 1985 for medical and scientific purposes under Chapter VII-A; all other NDPS imports are governed by Appendix I to ITC (HS) Schedule and require DGFT authorisation per ITC (HS) policy condition 2 to Chapter 29.
NDPS Rules, 1985 — Rule 53 · ITC (HS) policy condition 2 to Chapter 29
3
Comply with CBIC Circular 23/2023-Cus dated 30-09-2023 by furnishing mandatory additional qualifiers in the import declaration for Chapter 29 commodities as stipulated in paragraphs 4.1 and 4.2, with effect from 15-10-2023. Where the substance exceeds specified quantities of hazardous substances, take out an insurance policy under the Public Liability Insurance Act, 1991 per S.O. 227(E) dated 24-03-1992.
CBIC Circular 23/2023-Cus dated 30-09-2023 · S.O. 227(E) dated 24-03-1992

A word of counsel

The most common error on this tariff line is filing the bill of entry without first determining whether the specific substance is scheduled under the Insecticides Act, 1968 — a question that cannot be deferred to post-arrival. Consignments arriving at a non-notified port, or without a current CIB&RC registration and permit, face detention and seizure regardless of whether the NDPS or CWC overlays are satisfied; the CIB&RC registration and the port-of-import restriction are independent conditions, each of which must be met before the vessel departs.

Need a regulatory steer on this product?

Speak to a regulatory counsel about your specific HSN, IS, and supplier situation.

Speak to an Expert

Frequently asked

Does HSN 2921 45 31 require BIS certification?

No, naphthionic acid and its derivatives are not within the BIS Quality Control Order regime. Import is governed by CIB&RC under the Insecticides Act, 1968 where the substance is scheduled, with additional NDPS Rules, 1985 controls and DGFT ITC (HS) policy conditions applying as overlays.

Is import of this substance permitted at any Indian port, or are designated ports required?

Import of scheduled insecticides under this CTI is restricted to notified places under Rule 45 of the Insecticides Rules, 1971; consignments tendered at non-notified ports are liable to detention and refusal of out-of-charge.

When does the CWC restriction on nitrogen mustards and related compounds apply to this tariff line?

Where goods falling under this CTI are nitrogen mustards listed in Appendix II to Schedule I (Category 1A) of the ITC (HS) policy, import requires permission from the national authority; Category 1B compounds are additionally restricted to State Parties to the Chemical Weapons Convention only.

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