Butene (butylene) and isomers thereof

Butene (butylene) and isomers, acyclic hydrocarbons

CIB&RC CLEARANCE · NDPS CLEARANCE

HSN 2901 23 00 (Butene (butylene) and isomers thereof) is subject to the 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 Narcotic Drugs and Psychotropic Substances (NDPS) import-certificate requirements under Chapter VII-A of the NDPS Rules, 1985, where applicable. The tariff line is governed by ITC (HS) policy condition 2 of Chapter 29 administered by the Directorate General of Foreign Trade (DGFT), and mandatory Chapter 29 additional qualifiers in import declarations are required under CBIC Circular 23/2023-Cus.

What this is

HSN code

2901 23 00

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
If the substance figures in the Schedule to the Insecticides Act, 1968, 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 notified places of import under Rule 45 of the Insecticides Rules, 1971; verify the authorised port before booking cargo.
Insecticides Act, 1968 · Rule 45, Insecticides Rules, 1971 · ITC (HS) policy condition 2 to Chapter 29
2
Where the consignment contains an NDPS-scheduled substance, obtain an import certificate under Rule 53 of the NDPS Rules, 1985 before dispatch. Imports for purposes other than medical and scientific use are governed by Appendix-I to the ITC (HS) Schedule and are subject to strict quantity and end-use controls.
Chapter VII-A, NDPS Rules, 1985 · Rule 53, NDPS Rules, 1985 · ITC (HS) policy condition 2 to Chapter 29
3
File the bill of entry with the mandatory additional qualifiers for Chapter 29 commodities as stipulated in paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus, with effect from 15 October 2023. Where the imported quantity of a specified hazardous substance exceeds the prescribed threshold, obtain a public liability insurance policy under the provisions of the PLI 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 butene as a generic industrial hydrocarbon and filing the bill of entry without checking whether the specific isomer or formulation appears in the Schedule to the Insecticides Act, 1968 or on the NDPS-scheduled substances list. Either trigger imposes a separate pre-import clearance — CIB&RC registration and port restriction, or NDPS import certificate — and the absence of either at the bill-of-entry stage results in consignment detention, ground rent accrual, and potential seizure. The Chapter 29 mandatory qualifiers under CBIC Circular 23/2023-Cus must be filed regardless of which PGA regime applies.

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Frequently asked

Does HSN 2901 23 00 require BIS certification?

No. No BIS Quality Control Order covers acyclic hydrocarbons such as butene or its isomers. Import is governed by Central Insecticides Board and Registration Committee registration and permit requirements under the Insecticides Act, 1968, with a concurrent NDPS overlay under the NDPS Rules, 1985 where the substance is scheduled.

Are all ports open for import of butene falling under the Insecticides Act, 1968?

No. Places at which scheduled insecticides may be imported are restricted under Rule 45 of the Insecticides Rules, 1971; the authorised ports must be confirmed with the CIB&RC before cargo is routed.

Does the NDPS import-certificate requirement apply to every consignment of this HSN?

No. The NDPS import-certificate requirement under Rule 53 of the NDPS Rules, 1985 applies only where the specific substance in the consignment is listed on the NDPS schedule; imports outside that category are governed by Appendix-I to the ITC (HS) Schedule under policy condition 2 of Chapter 29.

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