Other

Other organo-inorganic compounds, residual phosphorus-bearing chemicals

DGFT CLEARANCE · CBIC CLEARANCE

HSN 2931 59 39 (residual other organo-inorganic compounds) is governed by the Directorate General of Foreign Trade (DGFT) under an import-free policy per DGFT Notification 44/2025-26, subject to Chemical Weapons Convention (CWC) controls on Schedule 1B phosphorus-bearing substances and mandatory Chapter 29 additional qualifiers under Central Board of Indirect Taxes and Customs (CBIC) Circular 23/2023-Cus. Importers of Schedule 1B chemicals must notify the National Authority for the Chemical Weapons Convention within 30 days of each consignment and submit a copy of the bill of entry to DGFT.

What this is

HSN code

2931 59 39

Chapter

29 · Organic chemicals

Primary regulator

DGFT · ITC (HS) free import policy with CWC Schedule 1B controls, Chapter 29

Customs documentation

Import declaration from DGFT
Chapter 29 qualifiers from CBIC
CWC notification copy to DGFT

Compliance steps

1
Verify whether the specific compound being imported is a Schedule 1B chemical — a phosphorus-bearing substance bonded to one methyl, ethyl, or propyl group with no further carbon atoms (e.g., methylphosphonyl dichloride, dimethyl methylphosphonate). If so, import is permitted only from State Parties to the Chemical Weapons Convention; confirm the exporting country's CWC membership before placing the purchase order.
DGFT Notification 44/2025-26 dated 15-10-2025 · ITC (HS) Chapter 29 General Note (CWC Schedule 1B controls)
2
Within 30 days of import of any Schedule 1B consignment, notify the National Authority Chemical Weapons Convention (Cabinet Secretariat, Ministry of External Affairs, D&ISA), the Department of Chemicals and Petrochemicals, and DGFT of the import details; submit a copy of the bill of entry to DGFT within the same 30-day window.
DGFT Notification 44/2025-26 dated 15-10-2025
3
Ensure the import declaration includes the mandatory additional qualifiers for Chapter 29 commodities as stipulated in paragraphs 4.1 and 4.2 of CBIC Circular 23/2023-Cus, effective 15 October 2023. Where the quantity of specified hazardous substances exceeds the threshold, obtain a Public Liability Insurance policy under 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 (MoEF)

A word of counsel

The most frequent error on this tariff line is treating the 'free' ITC (HS) status as unconditional and overlooking the Chemical Weapons Convention Schedule 1B overlay: fonofos (O-ethyl S-phenyl ethylphosphonothiolothionate) is explicitly classified as a Category 1B chemical, and import without a CWC-compliant exporter-country check and the 30-day post-import notification constitutes a direct breach of CWC obligations enforceable through the Cabinet Secretariat. The 30-day window for submitting the bill of entry copy to DGFT runs from the date of import, not from out-of-charge, and is non-extendable.

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Frequently asked

Does HSN 2931 59 39 require BIS certification?

No. No BIS Quality Control Order covers this residual organo-inorganic compound category. Import is governed by the Directorate General of Foreign Trade under the ITC (HS) free-import policy per DGFT Notification 44/2025-26, with Chemical Weapons Convention Schedule 1B controls applying to specified phosphorus-bearing substances.

What are the mandatory qualifiers required in the import declaration for Chapter 29 chemicals under this HSN?

CBIC Circular 23/2023-Cus dated 30 September 2023 mandates additional qualifiers in import declarations for all commodities under Chapter 29 as specified in paragraphs 4.1 and 4.2; these are required with effect from 15 October 2023 and non-compliance renders the bill of entry defective.

Does the CWC Schedule 1B notification obligation apply to all imports under this tariff line?

No — the 30-day post-import notification to the National Authority, Department of Chemicals and Petrochemicals, and DGFT applies only where the imported compound is a Schedule 1B chemical; compounds without a phosphorus atom bonded exclusively to one methyl, ethyl, or propyl group fall outside the CWC Schedule 1B regime.

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