Sodium 3-(trihydroxysilyl) propyl methylphosphonate

Organosilyl phosphonate compound for industrial chemical use

CIB&RC CLEARANCE · NDPS CLEARANCE

HSN 2931 49 10 (Sodium 3-(trihydroxysilyl) propyl methylphosphonate) is subject to Central Insecticides Board and Registration Committee (CIB&RC) registration and import permit requirements under the Insecticides Act, 1968, where the substance figures in the Schedule to that Act. Narcotic Drugs and Psychotropic Substances (NDPS) controls under Chapter VII-A of the NDPS Rules, 1985 and Directorate General of Foreign Trade (DGFT) ITC (HS) policy conditions for Chapter 29 apply as additional clearance requirements. Mandatory Chapter 29 additional qualifiers under CBIC Circular 23/2023-Cus dated 30-09-2023 must be declared in the import entry with effect from 15 October 2023.

What this is

HSN code

2931 49 10

Chapter

29 · Organic chemicals

Primary regulator

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

Customs documentation

Registration and import permit from CIB&RC
Import certificate from NDPS
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 the substance figures 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 before shipment. Import of scheduled insecticides is restricted to ports specified under Rule 45 of the Insecticides Rules, 1971, and diversion to a non-notified port renders the consignment liable to seizure.
Insecticides Act, 1968 · Rule 45 of the Insecticides Rules, 1971
2
Where the substance qualifies as an NDPS item, import only under an import certificate obtained under Rule 53 of the NDPS Rules, 1985, for medical or scientific purposes per Chapter VII-A of those Rules. Imports outside that category are governed by Appendix I to the ITC (HS) Schedule under ITC (HS) policy condition 2 to Chapter 29.
Rule 53 of the NDPS Rules, 1985 · ITC (HS) policy condition 2 to Chapter 29
3
File mandatory additional qualifiers in the import declaration for Chapter 29 commodities as stipulated in paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus dated 30-09-2023, operative from 15 October 2023. Also verify compliance with Appendix II of the ITC (HS) import policy, and where import quantities of specified hazardous substances exceed prescribed thresholds, take out a Public Liability Insurance policy 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 · ITC (HS) Appendix II

A word of counsel

The most common error on this tariff line is assuming the substance is a straightforward organo-inorganic chemical and overlooking the dual-regime trigger: a single consignment may simultaneously engage CIB&RC permit requirements (if the substance is in the Insecticides Act Schedule) and NDPS import-certificate requirements (if it is a listed psychotropic precursor), each demanding separate pre-shipment clearance. Failing to screen against both Schedules before filing the bill of entry results in consignment detention at the designated port and, in the NDPS context, potential criminal liability under the Narcotic Drugs and Psychotropic Substances Act, 1985.

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Frequently asked

Does HSN 2931 49 10 require BIS certification?

No, no BIS Quality Control Order covers this organo-inorganic compound. Import is governed by the Central Insecticides Board and Registration Committee under the Insecticides Act, 1968 where the substance is a scheduled insecticide, with a concurrent NDPS import-certificate overlay under the NDPS Rules, 1985 where applicable.

Are there port restrictions on the import of scheduled insecticides under this tariff line?

Yes. Rule 45 of the Insecticides Rules, 1971 restricts the places at which insecticides may be imported; the CIB&RC registration and import permit must be obtained before the consignment is routed, and only notified ports may be used.

Does the Public Liability Insurance requirement apply to every import of this substance?

No. The insurance obligation under S.O. 227(E) dated 24-03-1992 is triggered only when the import of specified hazardous substances exceeds the quantities prescribed under the Public Liability Insurance Act, 1991; importers must assess the consignment quantity against those thresholds before filing.

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