HS code 2831 10 10: Sodium dithionites (sodium hydrosulphite)
HS code 2831 10 10 covers sodium dithionites (sodium hydrosulphite) in chapter 28 (inorganic chemicals). Total import duty is about 27.73% of the import value; DGFT import policy: Free.
Updated 2026-11-01 from official lists, including Budget 2026 and later customs notifications.
Key facts
| Tariff item (8-digit HS code) | 2831 10 10 |
|---|---|
| Description | Sodium dithionites (sodium hydrosulphite) |
| Chapter | 28: Inorganic chemicals |
| Heading | 2831: Of sodium |
| Unit | kg. |
| Basic customs duty (tariff rate) | 7.5% |
| Basic customs duty charged | 7.5% |
| Social welfare surcharge | 10% of BCD |
| IGST | 18% |
| Total import duty | about 27.73% of the import value |
| DGFT import policy | Free |
| DGFT export policy | Free |
Import duty (with Budget 2026 changes)
- About ₹27,730 duty on every ₹1,00,000 of import value (CIF).
DGFT import and export policy
- Import: Free.
- Export: Free.
Anti-dumping duties
- Sodium hydrosulphite (sodium dithionite): anti-dumping duty on imports from China PR, Korea RP (notification 71/2021-Customs (ADD), until 16 Dec 2026).
India's imports and exports
- India imported 124 tonnes in 2025-26 (down 37.5% on 2024-25) under tariff item 28311010, “Sodium dithionites (sodium hydrosulphite)”.
- India exported 10,095 tonnes in 2025-26 (up 5.9% on 2024-25) under tariff item 28311010, “Sodium dithionites (sodium hydrosulphite)”.
Chemicals under HS code 2831 10 10
Questions about HS code 2831 10 10
What is the import duty on HS code 2831 10 10 in India?
About 27.73% of the import value: basic customs duty 7.5%, social welfare surcharge 10% of BCD and IGST 18%. IGST can usually be claimed back as input tax credit.
Is the import of sodium dithionites (sodium hydrosulphite) free in India?
DGFT import policy for HS code 2831 10 10 is Free.
Can sodium dithionites (sodium hydrosulphite) be exported from India?
DGFT export policy for HS code 2831 10 10 is Free.
Is there anti-dumping duty on HS code 2831 10 10?
Yes, on Sodium hydrosulphite (sodium dithionite) from China PR, Korea RP.
Which chemicals fall under HS code 2831 10 10?
Sodium Dithionite.
Other lines under heading 2831
Sources: Customs Tariff of India (CBIC) · Notification 45/2025-Customs and Budget 2026 amendments · IGST rates, Notification 9/2025-Integrated Tax (Rate) · DGFT ITC(HS) import and export policy · CBIC Customs (ADD) notifications · Export Import Data Bank (DGCI&S). Guidance from official lists, not legal advice; confirm the classification with your customs broker.