Dimethyl diphenyl urea (zentralin)

Dimethyl diphenyl urea (zentralin), ureine derivatives

CIB&RC CLEARANCE · NDPS CLEARANCE

HSN 2924 21 20 (Dimethyl diphenyl urea / zentralin) 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. Imports of narcotic drugs and psychotropic substances are concurrently governed by the Narcotic Drugs and Psychotropic Substances (NDPS) Rules, 1985, and the Directorate General of Foreign Trade (DGFT) ITC (HS) policy condition 2 of Chapter 29 applies as the overarching trade-policy overlay.

What this is

HSN code

2924 21 20

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
Import certificate from NDPS

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 so, obtain registration and an import permit from the secretariat of the Central Insecticides Board and Registration Committee, and route the consignment only through ports permitted under Rule 45 of the Insecticides Rules, 1971.
Insecticides Act, 1968 · Rule 45 of the Insecticides Rules, 1971 · ITC (HS) policy condition 2 of Chapter 29
2
Where the substance is imported for medical or scientific purposes under the NDPS framework, obtain an import certificate under Rule 53 of the NDPS Rules, 1985 before filing the bill of entry. Imports outside the medical/scientific category are governed by Appendix I to the ITC (HS) Schedule.
Chapter VII-A of the NDPS Rules, 1985 · Rule 53 of the NDPS Rules, 1985 · ITC (HS) policy condition 2 of Chapter 29
3
File mandatory additional qualifiers in the import declaration as required under CBIC Circular 23/2023-Cus dated 30-09-2023 for all commodities under Chapter 29, with effect from 15 October 2023. If the import quantity of a specified hazardous substance exceeds the threshold under S.O. 227(E) dated 24-03-1992, the owner must take out an insurance policy under the Public Liability Insurance Act, 1991.
CBIC Circular 23/2023-Cus dated 30-09-2023 (para 4.1 and 4.2) · S.O. 227(E) dated 24-03-1992

A word of counsel

The most frequent error on this tariff line is assuming that because the substance is an organic chemical, neither the CIB&RC nor the NDPS overlay applies. Zentralin and its analogues can fall within the schedule to the Insecticides Act, 1968 — the determination is substance-specific and must be made before the purchase order is placed, not at the port of entry. A consignment arriving without CIB&RC registration and a valid import permit will be detained at the designated port, attracting storage demurrage and potential confiscation under the Insecticides Act.

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Frequently asked

Does HSN 2924 21 20 require BIS certification?

No; no BIS Quality Control Order covers ureine derivatives or dimethyl diphenyl urea. Import is governed by the Central Insecticides Board and Registration Committee under the Insecticides Act, 1968, with an NDPS Rules, 1985 overlay where the substance is used for medical or scientific purposes.

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

Ports at which insecticides may be imported are restricted under Rule 45 of the Insecticides Rules, 1971; the permitted-port list must be confirmed with CIB&RC before shipment, as diversion to an unpermitted port constitutes a violation of the Insecticides Rules.

When does the Public Liability Insurance obligation apply to imports under this CTI?

Where the import quantity of a specified hazardous substance exceeds the threshold quantities prescribed under S.O. 227(E) dated 24-03-1992, the owner is required to take out an insurance policy under the Public Liability Insurance Act, 1991 before clearance.

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