HSN code · Customs Tariff of India · GST rate
25120010 is the 8-digit HSN code for “Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths”: tariff item 2512 00 10 under heading 2512 of the Customs Tariff of India. GST on this code is 5%. Search a code or product below, or copy the code for your invoice.
This code
Chapter 25Heading 2512Sub-heading 2512 00Tariff item 2512 00 10
Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less: Kieselguhr
Tariff item 2512 00 10 · Heading 2512 · Chapter 25, Customs Tariff of India
The code
What the code covers in the Customs Tariff of India, and the GST rate entries that apply to it.
251200108 digits: 25 + 12 + 00 + 102512 00 10KieselguhrHow to read it
An HSN code is built in layers. Each pair of digits narrows the one before it: 2 digits = chapter, 4 = heading, 6 = sub-heading, 8 = tariff item in the Customs Tariff of India.
The broadest layer. Chapter 25 covers salt, sulphur, earths and stones, plastering materials, lime and cement. It sits in Section V, mineral products.
Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less.
Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less.
Kieselguhr. The full 8-digit code used in the Customs Tariff of India and on invoices that show the complete HSN.
Unit of quantity: kg.
GST rate
One entry of the GST rate notification names this code: Notification No. 9/2025-Integrated Tax (Rate), Schedule I (5%), S. No. 173, “Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less”, effective from 22 September 2025. The matching Central Tax entry is Notification No. 9/2025-Central Tax (Rate), Schedule I (2.5%), same S. No.
| Entry | Tariff column, as printed | Description, as printed | GST rate |
|---|---|---|---|
| Schedule I, S. No. 173Notification No. 9/2025-Integrated Tax (Rate)Central Tax: Notification No. 9/2025-Central Tax (Rate) | 2512 | Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less | 5%IGST 5% · CGST 2.5% · SGST/UTGST 2.5%From 22 September 2025 |
25120010 is covered by the highlighted entry. The 5% IGST rate corresponds to CGST 2.5% + SGST/UTGST 2.5% on supplies within a State.
On your invoice
Notification No. 78/2020-Central Tax dated 15.10.2020 sets the minimum number of HSN digits on B2B tax invoices from 1 April 2021, by the business's aggregate turnover in the previous year.
Businesses with aggregate turnover up to ₹5 crore in the previous year show at least the heading, 2512, on B2B tax invoices.
Above ₹5 crore, at least the sub-heading, 251200, goes on B2B tax invoices.
Many businesses show the full 25120010, the tariff item itself.
Rate history
5% IGST · 2.5% CGST + 2.5% SGST/UTGST
Notification No. 9/2025-Integrated Tax (Rate), Schedule I (5%), S. No. 173: “Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less”. Central Tax: Notification No. 9/2025-Central Tax (Rate), Schedule I (2.5%), same S. No. Notification 9/2025 superseded Notification No. 1/2017-Integrated Tax (Rate) dated 28.06.2017.
Earlier rates under Notification 1/2017 are not shown here
Notification No. 1/2017-Integrated Tax (Rate) dated 28.06.2017 applied until it was superseded by Notification 9/2025.
Related codes
Heading 2512, siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less. The codes below sit closest to 25120010 in the Customs Tariff of India: codes elsewhere in chapter 25. Each is shown in the official wording and has its own page with its GST rate entries. Use the search above for any other code.
25140000Heading 2514 · tariff item 2514 00 0025151100Heading 2515 · tariff item 2515 11 00Codes under other headings of chapter 25, salt, sulphur, earths and stones, plastering materials, lime and cement. Each page shows that code's own heading and GST rate entries.
Questions
5% IGST, made up of 2.5% CGST and 2.5% SGST/UTGST, from 22 September 2025. The entry is Notification No. 9/2025-Integrated Tax (Rate), Schedule I (5%), S. No. 173: “Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less”. The matching Central Tax entry is Notification No. 9/2025-Central Tax (Rate), Schedule I (2.5%), same S. No.
At least 4 digits if your aggregate turnover in the previous year was up to ₹5 crore, and at least 6 digits above ₹5 crore, on B2B tax invoices (Notification No. 78/2020-Central Tax dated 15.10.2020, from 1 April 2021). For this code that is 2512 or 251200; many businesses use the full 25120010.
Tariff item 2512 00 10 of the Customs Tariff of India, First Schedule: “Kieselguhr”, under sub-heading 2512 00 (“Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less”), heading 2512 (“Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less”), in chapter 25 (salt, sulphur, earths and stones, plastering materials, lime and cement), Section V (mineral products). Unit of quantity: kg.
About this page
The section, chapter, heading, sub-heading and tariff item on this page are taken from the Customs Tariff of India, First Schedule (Customs Tariff Act, 1975), CBIC edition as on 30 June 2024, with the tariff-line changes of the Finance (No. 2) Act 2024, Finance Act 2025 and Finance Act 2026 applied. The GST entries are taken from Notification No. 9/2025-Integrated Tax (Rate) and No. 9/2025-Central Tax (Rate) dated 17.09.2025 (as corrected 18.09.2025), as amended by Notifications 19/2025 and 01/2026; exemptions: Notification No. 10/2025.
This is reference information for classification and invoicing. It is not advice on how your own goods should be classified, and the official tariff and notifications prevail if the two ever differ. A change in the tariff or in a rate notification re-opens this page for an update.
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