Laurent’s acid (1-naphthylamine-5-sulphonic acid)

Laurent's acid, naphthylamine sulphonic acid derivative

CIB&RC CLEARANCE · NDPS CLEARANCE

HSN 2921 45 25 (Laurent's acid) is subject to registration and import permit from the Central Insecticides Board and Registration Committee (CIB&RC) under the Insecticides Act, 1968, where the substance figures 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) conditions apply concurrently under Chapter VII-A of the NDPS Rules, 1985, and the tariff line carries Chemical Weapons Convention (CWC) Schedule I restrictions administered by the Directorate General of Foreign Trade (DGFT) under the ITC (HS) import policy. Mandatory Chapter 29 qualifiers must be furnished in the import declaration per Central Board of Indirect Taxes and Customs (CBIC) Circular 23/2023-Cus dated 30-09-2023.

What this is

HSN code

2921 45 25

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
Verify whether the specific substance under this CTI is scheduled under the Insecticides Act, 1968; if so, obtain registration and an import permit from the secretariat of the Central Insecticides Board and Registration Committee before shipment. Import is restricted to notified places of import under Rule 45 of the Insecticides Rules, 1971.
Insecticides Act, 1968 · Rule 45 of the Insecticides Rules, 1971 · ITC (HS) CCR note on CIB&RC
2
Where the substance is a scheduled NDPS substance, obtain an import certificate under Rule 53 of the NDPS Rules, 1985 for medical and scientific purposes; all other NDPS imports are governed by Appendix I to the ITC (HS) Schedule under ITC (HS) policy condition 2 to Chapter 29.
Chapter VII-A of the NDPS Rules, 1985 · Rule 53 of the NDPS Rules, 1985 · ITC (HS) policy condition 2 to Chapter 29
3
Furnish the mandatory additional qualifiers in the import declaration under CBIC Circular 23/2023-Cus dated 30-09-2023, paragraphs 4.1 and 4.2, applicable to all commodities under Chapter 29 with effect from 15-10-2023. Where import quantities of specified hazardous substances exceed the prescribed threshold, 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 treating CIB&RC registration as a single-clearance event and overlooking the concurrent NDPS and CWC overlay checks. Laurent's acid falls within a naphthylamine derivative sub-heading that also covers compounds subject to CWC Schedule I (Category IA and IB) restrictions — importers must confirm, substance by substance, whether the specific derivative is a CWC-controlled chemical requiring national authority permission and State-party origin verification before placing the purchase order. A bill of entry that clears CIB&RC but lacks the CWC national-authority permission or the correct NDPS import certificate will be detained at the port of import, with confiscation and monetary penalty exposure under the relevant Act.

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Frequently asked

Does HSN 2921 45 25 require BIS certification?

No, Laurent's acid falls entirely outside the BIS Quality Control Order regime; no BIS QCO covers naphthylamine sulphonic acid derivatives. Import is governed by CIB&RC registration under the Insecticides Act, 1968, with concurrent NDPS Rules and CWC-linked ITC (HS) policy controls administered by DGFT.

Which ports are notified for import of insecticides under this tariff line?

Import of substances scheduled under the Insecticides Act, 1968 is restricted to notified places of import specified under Rule 45 of the Insecticides Rules, 1971; the current list should be confirmed with the CIB&RC secretariat before shipment.

Does the CWC restriction apply to all derivatives under this sub-heading, or only to specific compounds?

The CWC restrictions under Appendix II to Schedule I of the ITC (HS) policy apply only to nitrogen mustards and the specifically named N,N-dialkyl aminoethyl-2-chlorides (Category IA and IB); importers must verify the CAS identity of their substance against the CWC schedules before filing the bill of entry.

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