Thio sulphonic acid
Thiosulphonic acid, organo-sulphur compound
HSN 2930 90 13 (Thio sulphonic acid) is subject to Central Insecticides Board and Registration Committee (CIB&RC) registration under the Insecticides Act, 1968 where the substance is intended for insecticidal use, and to Narcotic Drugs and Psychotropic Substances (NDPS) import-certificate conditions under Chapter VII-A of the NDPS Rules, 1985 where any NDPS-scheduled constituent is present. The Ministry of Environment, Forest and Climate Change (MEFCC) Public Liability Insurance Act, 1991 overlay applies on import of specified hazardous substances exceeding notified quantities, and DGFT and CBIC policy conditions — including mandatory Chapter 29 qualifiers — apply at the bill-of-entry stage.
- Registration certificate from CIB&RC
- Import certificate from NDPS
- Certificate of Analysis from CBIC
Procedural directions for customs clearance are issued by: Directorate General of Foreign Trade, Central Board of Indirect Taxes and Customs.
- 1If thiosulphonic acid is imported for insecticidal, fungicidal, herbicidal, or rodenticidal use, obtain CIB&RC registration under Section 9 of the Insecticides Act, 1968 before shipment. Where imported for a non-insecticidal purpose, obtain an import permit from the Registration Committee under the Department of Agriculture and Cooperation; import is restricted to sources specified on the certificate or permit, and to ports notified under Rule 45 of the Insecticides Rules, 1971.Section 9 of the Insecticides Act, 1968 · Rule 45 of the Insecticides Rules, 1971 · CBIC Circulars 35/2011 dated 09-08-2011 and 7/2014 dated 07-03-2014
- 2If the consignment contains any NDPS-scheduled substance, obtain an import certificate under Rule 53 of the NDPS Rules, 1985 for medical or scientific purposes (Category A), or comply with Appendix-I of the ITC (HS) Schedule for all other imports per ITC (HS) policy condition 2 of Chapter 29. Upload mandatory e-Sanchit documents — Certificate of Analysis – Drug (0010dc), Batch Release Certificate (0030dc), Label of Consignment (0110dc), Registration Certificate for Drugs (101dc1), and Import Licence for Drugs (9111dc) — before out-of-charge.Chapter VII-A of the NDPS Rules, 1985 · Rule 53 of the NDPS Rules, 1985 · ITC (HS) policy condition 2 to Chapter 29
- 3Ensure compliance with CBIC Circular 23/2023-Cus dated 30-09-2023 by including mandatory additional qualifiers in the import declaration for Chapter 29 commodities with effect from 15 October 2023. Where the consignment qualifies as a specified hazardous substance exceeding notified quantities, take out an insurance policy under the Public Liability Insurance Act, 1991 as required by S.O. 227(E) dated 24-03-1992 issued by MEFCC.CBIC Circular 23/2023-Cus dated 30-09-2023 · S.O. 227(E) dated 24-03-1992 · DGFT Notification 44/2025-26 dated 15-10-2025
The most pervasive error on this tariff line is treating the CIB&RC registration as universally required and overlooking the non-insecticidal-use import-permit pathway — or, conversely, assuming the non-insecticidal permit dispenses with the NDPS certificate where a scheduled substance is present. Both obligations are independent: a consignment arriving with CIB&RC registration but without the Rule 53 NDPS import certificate for a scheduled constituent faces detention and potential seizure under the NDPS Act, 1985, irrespective of the Insecticides Act compliance status. The CBIC Chapter 29 qualifier requirement under Circular 23/2023-Cus is a separate, concurrent obligation that applies regardless of which PGA regime governs the substantive import.