Sulphanillic acid (para aminobenzene sulphonic acid para aniline sulphonic acid)

Sulphanilic acid, aniline sulphonic acid derivatives

CIB&RC CLEARANCE · NDPS CLEARANCE

HSN 2921 42 34 (Sulphanilic acid) is subject to Central Insecticides Board and Registration Committee (CIB&RC) registration and import permit under the Insecticides Act, 1968, where the substance falls within 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) framework conditions and Chemical Weapons Convention (CWC) category controls under the ITC (HS) policy apply as concurrent overlays where the specific substance is scheduled. Mandatory Chapter 29 qualifiers under CBIC Circular 23/2023-Cus dated 30-09-2023 and Public Liability Insurance requirements under S.O. 227(E) dated 24-03-1992 apply as additional customs-level obligations.

What this is

HSN code

2921 42 34

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
Determine whether the specific substance falls within the Schedule to the Insecticides Act, 1968. If scheduled, obtain registration and an import permit from the Secretariat of the Central Insecticides Board and Registration Committee, and route the consignment 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 is an NDPS-scheduled compound, obtain an import certificate under Rule 53 of the NDPS Rules, 1985 for medical or scientific purposes, or confirm compliance with Appendix-I to the ITC (HS) Schedule under ITC (HS) policy condition 2 to Chapter 29 for other permitted imports. CWC Category IA or IB controlled nitrogen mustards require prior permission from the national authority and must be imported only from State Parties to the CWC.
Chapter VII-A of the NDPS Rules, 1985 · Rule 53 of the NDPS Rules, 1985 · Appendix II to Schedule I (Cat IA and Cat IB) of the ITC (HS) policy
3
File mandatory additional qualifiers for Chapter 29 commodities in the import declaration with effect from 15 October 2023 as stipulated in Paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus. Where hazardous substances are imported exceeding specified quantities, take out a Public Liability Insurance policy as required under 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 assuming that sulphanilic acid is invariably outside the scope of the Insecticides Act, 1968 because it is primarily known as a dye intermediate. Where the imported substance is identified as falling within the Schedule to the Insecticides Act, absence of CIB&RC registration at the bill-of-entry stage results in consignment detention at the port of import and exposure to penalties under the Act — not merely a documentation deficiency correctable through e-Sanchit rectification. Confirm scheduled status with CIB&RC before placing the purchase order.

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Frequently asked

Does HSN 2921 42 34 require BIS certification?

No, sulphanilic acid and aniline sulphonic acid derivatives fall outside the BIS Quality Control Order regime; no BIS QCO covers this product family. Import is governed by the Central Insecticides Board and Registration Committee under the Insecticides Act, 1968, with NDPS and CWC policy overlays where the specific substance is scheduled.

Which document codes must be uploaded in e-Sanchit for this tariff line?

The mandatory documents cited in the CCR are: certificate of analysis — drug (0010dc), batch release certificate (0030dc), label of consignment (0110dc), registration certificate for drugs (101dc1), and import licence for drugs (9111dc); all must be uploaded in e-Sanchit before customs out-of-charge.

When do the CWC category controls apply to imports under this CTI?

CWC Category IA controls apply to nitrogen mustards listed in Appendix II to Schedule I of the ITC (HS) policy, requiring prior permission from the national authority; Category IB controls apply to the specified chlorinated ethylamine compounds, and import of both categories is permitted only from State Parties to the Chemical Weapons Convention.

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