Dimethyl phosphite

Dimethyl phosphite, organophosphorus ester chemical

CIB&RC CLEARANCE · NDPS CLEARANCE

HSN 2920 21 00 (Dimethyl phosphite) 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, and to Chemical Weapons Convention (CWC) post-import notification obligations as a Category 1C chemical under ITC (HS) policy condition 3 of Chapter 29 administered by the Directorate General of Foreign Trade (DGFT). Narcotic Drugs and Psychotropic Substances (NDPS) rules overlay and mandatory Chapter 29 additional qualifiers under CBIC Circular 23/2023-Cus apply as further clearance requirements.

What this is

HSN code

2920 21 00

Chapter

29 · Organic chemicals

Primary regulator

CIB&RC · Insecticides Act, 1968; CWC Act and Rules (Category 1C chemical)

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 formulation of Dimethyl phosphite is listed in 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 before shipment, and ensure import is routed only through ports permitted under Rule 45 of the Insecticides Rules, 1971.
Insecticides Act, 1968 · Rule 45 of the Insecticides Rules, 1971 · ITC (HS) Chapter 29 policy
2
Within 30 days of each import, notify consignment details to the National Authority (CWC), Cabinet Secretariat — Ministry of External Affairs (D&ISA), Department of Chemicals and Petrochemicals, and DGFT, and submit a copy of the bill of entry to DGFT. This post-import notification is mandatory for every consignment as Dimethyl phosphite is a Category 1C chemical under Appendix II of the ITC (HS) import policy.
CWC Act and Rules · ITC (HS) policy condition 3 of Chapter 29
3
Comply with CBIC Circular 23/2023-Cus dated 30-09-2023 by including the mandatory additional qualifiers in the import declaration for Chapter 29 commodities as stipulated in paragraphs 4.1 and 4.2, effective 15 October 2023. Ensure compliance with the Public Liability Insurance Act, 1991 where imports of specified hazardous substances exceed the quantities notified 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 treating the CIB&RC permit as the sole compliance obligation and overlooking the post-import CWC notification window. The 30-day notification deadline to four separate authorities runs from the date of import — not from the date of out-of-charge — and a missed deadline constitutes a breach of ITC (HS) policy condition 3, exposing the importer to DGFT enforcement independently of any CIB&RC or customs clearance already obtained.

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Frequently asked

Does HSN 2920 21 00 require BIS certification?

No. No BIS Quality Control Order covers Dimethyl phosphite. Import is governed by the Central Insecticides Board and Registration Committee under the Insecticides Act, 1968 where the substance is scheduled, and by CWC Category 1C chemical obligations under ITC (HS) policy condition 3 of Chapter 29 administered by DGFT.

Are there port restrictions for importing Dimethyl phosphite?

Yes. Where the substance falls within the schedule to the Insecticides Act, 1968, import is restricted to ports notified under Rule 45 of the Insecticides Rules, 1971; routing a scheduled consignment through an unpermitted port renders it liable to detention and seizure.

Does the NDPS overlay apply to Dimethyl phosphite specifically?

The NDPS overlay under ITC (HS) policy condition 2 of Chapter 29 applies to substances under this CTI that figure in the NDPS schedule; imports for medical and scientific purposes require an import certificate under Rule 53 of the NDPS Rules, 1985, while all other NDPS-scheduled imports are governed by Appendix I of the ITC (HS) schedule.

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