Q3HSN Code 2831
Dithionites and sulphoxylates
GST rate
| Thorium oxalate, Enriched KBF4 (enriched potassium fluroborate), Enriched elemental boron, Nuclear fuel | 5% |
| Anaesthetics, Potassium Iodate, Iodine, Steam | 5% |
| Micronutrients, which are covered under serial number 1(g) of Schedule 1, Part (A) of the Fertilizer Control Order, 1985 and are manufactured by the manufacturers which are registered under the Fertilizer Control Order, 1985 | 5% |
| All inorganic chemicals [other than those specified in notification th No.10/2025- Central Tax (Rate) dated 17 September 2025 or other Schedules of this notification] | 18% |
Codes under 2831
| Code | Description | GST rate |
|---|---|---|
| 2831 10 | Sodium — dithionites and sulphoxylates | Varies |
| 2831 10 10 | Sodium dithionites (sodium hydrosulphite) | Varies |
| 2831 10 20 | Sodium sulphoxylates (including sodium formaldehyde sulphoxylate) | Varies |
| 2831 90 | Dithionites and sulphoxylates › Other | Varies |
| 2831 90 10 | Dithionites | Varies |
| 2831 90 20 | Sulphoxylates | Varies |
← Chapter 28: Industrial gases and inorganic chemicals
Related HSN codes
Frequently Asked Questions
What is the HSN code for dithionites and sulphoxylates?
The HSN code for dithionites and sulphoxylates is 2831, under Chapter 28 (Industrial gases and inorganic chemicals).
What is the GST rate on dithionites and sulphoxylates?
It depends on the specific item: thorium oxalate, enriched kbf4 (enriched potassium fluroborate), enriched elemental boron, nuclear fuel is 5%; anaesthetics, potassium iodate, iodine, steam is 5%; micronutrients, which are covered under serial number 1(g) of schedule 1, part (a) of the fertilizer control order, 1985 and are manufactured by the manufacturers which are registered under the fertilizer control order, 1985 is 5%; all inorganic chemicals [other than those specified in notification th no.10/2025- central tax (rate) dated 17 september 2025 or other schedules of this notification] is 18%.
How many digits of the HSN code go on a GST invoice?
It depends on your turnover in the previous financial year: businesses above ₹5 crore generally show 6 digits (8 for certain specified goods), and smaller businesses show 4 digits on B2B invoices. Check the current e-invoicing/HSN notification for the exact threshold that applies to you.
Rates as per Notification No. 9/2025-Central Tax (Rate), as amended, as of 7 October 2026. For guidance only — verify with your tax advisor.