Q3HSN Code 2621
Other slag and ash, inlcuding seaweed ash (kelp),ash
Other slag and ash, inlcuding seaweed ash (kelp),ash and residues from the incineration of municipal waste
GST rate
| Fly Ash | 5% |
| Other slag and ash, including seaweed ash (kelp); ash and residues from the incineration of municipal waste [other than fly ash] | 18% |
Codes under 2621
| Code | Description | GST rate |
|---|---|---|
| 2621 10 | Ash and residues from the incineration of municipal waste | Varies |
| 2621 90 | Other slag and ash, inlcuding seaweed ash (kelp),ash and residues from the incineration of municipal waste › Other | Varies |
← Chapter 26: Ores, slag and ash
Related HSN codes
Frequently Asked Questions
What is the HSN code for other slag and ash, inlcuding seaweed ash (kelp),ash?
The HSN code for other slag and ash, inlcuding seaweed ash (kelp),ash is 2621, under Chapter 26 (Ores, slag and ash).
What is the GST rate on other slag and ash, inlcuding seaweed ash (kelp),ash?
It depends on the specific item: fly ash is 5%; other slag and ash, including seaweed ash (kelp); ash and residues from the incineration of municipal waste [other than fly ash] 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.