HS code 2811 29 50: Sulphur trioxide (sulphuric anhydride)

HS code 2811 29 50 covers sulphur trioxide (sulphuric anhydride) in chapter 28 (inorganic chemicals). Total import duty is about 27.73% of the import value; DGFT import policy: Free.

Total import dutyabout 27.73%
Basic customs duty7.5%
IGST18%
Import policyFree
Export policyFree
Anti-dumpingNone found

Updated 2026-11-01 from official lists, including Budget 2026 and later customs notifications.

Check a chemical on this line Check a whole list

Key facts

Tariff item (8-digit HS code)2811 29 50
DescriptionSulphur trioxide (sulphuric anhydride)
Chapter28: Inorganic chemicals
Heading2811: Other inorganic oxygen compounds of non-metals
Unitkg.
Basic customs duty (tariff rate)7.5%
Basic customs duty charged7.5%
Social welfare surcharge10% of BCD
IGST18%
Total import dutyabout 27.73% of the import value
DGFT import policyFree
DGFT export policyFree

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.

Chemicals under HS code 2811 29 50

Sulfur trioxide

Questions about HS code 2811 29 50

What is the import duty on HS code 2811 29 50 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 sulphur trioxide (sulphuric anhydride) free in India?

DGFT import policy for HS code 2811 29 50 is Free.

Can sulphur trioxide (sulphuric anhydride) be exported from India?

DGFT export policy for HS code 2811 29 50 is Free.

Which chemicals fall under HS code 2811 29 50?

Sulfur trioxide.

Other lines under heading 2811

2811 11 00: Hydrogen fluoride (hydrofluoric acid)2811 12 00: Hydrogen cyanide (hydrocyanic acid )2811 19 20: Hypophosphorus acid (phosphinic acid)2811 19 30: Acids of arsenic2811 19 40: Sulphonic acid2811 19 90: Other inorganic acids: other2811 21 10: Dry ice2811 21 90: Carbon dioxide: other2811 22 00: Silicon dioxide2811 29 10: Arsenic pentaoxide2811 29 20: Arsenic trioxide2811 29 30: Nitrous oxide2811 29 40: Carbon monoxide2811 29 90: Other inorganic oxygen compounds of non-metals: ot

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.