Bronner’s acid (2-naphthylamine-6-sulphonic acid)

Bronner's acid, naphthylamine sulphonic acid derivative

CIB&RC CLEARANCE · NDPS CLEARANCE

HSN 2921 45 21 (Bronner's acid) is subject to Central Insecticides Board and Registration Committee (CIB&RC) registration and import permit under the Insecticides Act, 1968, where the substance figures in the schedule to that Act, with import restricted to notified ports under Rule 45 of the Insecticides Rules, 1971. Narcotic Drugs and Psychotropic Substances (NDPS) Rules, 1985 conditions apply where the substance is classified under the NDPS schedule, requiring an import certificate under Rule 53. Chemical Weapons Convention (CWC) restrictions, DGFT ITC (HS) policy conditions, and CBIC Circular 23/2023-Cus mandatory Chapter 29 qualifier declarations apply as additional clearance overlays.

What this is

HSN code

2921 45 21

Chapter

29 · Organic chemicals

Primary regulator

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

Customs documentation

Registration certificate from CIB&RC
Import permit from CIB&RC
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 Bronner's acid figures in the schedule to the Insecticides Act, 1968; if so, obtain both a registration certificate and an import permit from the Secretariat of the Central Insecticides Board and Registration Committee before the consignment is dispatched. Import is restricted to notified places under Rule 45 of the Insecticides Rules, 1971 — route accordingly.
Insecticides Act, 1968 · Rule 45 of the Insecticides Rules, 1971 · ITC (HS) policy, Chapter 29
2
Where the substance is classified under the NDPS schedule, secure an import certificate under Rule 53 of the NDPS Rules, 1985 for medical or scientific use (details at http://cbn.nic.in). Imports outside that category are governed by Appendix I to the ITC (HS) Schedule under policy condition 2 to Chapter 29.
Chapter VII-A and Rule 53 of the NDPS Rules, 1985 · ITC (HS) policy condition 2 to Chapter 29
3
File mandatory additional qualifiers in the import declaration at the bill of entry as required by CBIC Circular 23/2023-Cus dated 30-09-2023 (paragraphs 4.1 and 4.2), effective 15 October 2023, for all commodities under Chapter 29. If the consignment 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 (MoEF)

A word of counsel

The most common error on this tariff line is assuming that CIB&RC clearance alone exhausts the compliance obligation. This CTI carries a layered regime: the CIB&RC scheduled-substance check, the NDPS import-certificate requirement, CWC Schedule I restrictions on specific naphthylamine derivatives, and the Chapter 29 mandatory qualifier declaration under CBIC Circular 23/2023-Cus are independently triggered — failure on any one layer is sufficient grounds for consignment detention and monetary penalty, even where the others are satisfied.

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 21 require BIS certification?

No. No BIS Quality Control Order covers naphthylamine sulphonic acid derivatives. Import of Bronner's acid is governed by the Central Insecticides Board and Registration Committee under the Insecticides Act, 1968, with concurrent NDPS Rules, 1985 and ITC (HS) policy overlays where applicable.

Are all ports open for import of scheduled insecticides under this CTI?

No. Import of insecticides listed in the schedule to the Insecticides Act, 1968 is restricted to notified places under Rule 45 of the Insecticides Rules, 1971; consignments arriving at non-notified ports are liable to detention and seizure.

When does the CWC restriction on naphthylamine derivatives apply?

CWC Schedule I (Category 1A and 1B) restrictions — including the requirement to import nitrogen mustards only from State Parties to the CWC with national authority permission — apply where the specific derivative falls within Appendix II to Schedule I of the ITC (HS) policy; verify the exact structural identity of the derivative against that Appendix before placing the purchase order.

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