HSN code · Customs Tariff of India · GST rate
29215940 is the 8-digit HSN code for “Aromatic polyamines and their derivatives; salts thereof: Other: Diaminostilbene 2,2-disulphonic acid (Dasda)”: tariff item 2921 59 40 under heading 2921 of the Customs Tariff of India. The GST rate depends on the goods: the entries for this code carry 5% or 18%. Search a code or product below, or copy the code for your invoice.
This code
Chapter 29Heading 2921Sub-heading 2921 59Tariff item 2921 59 40
Aromatic polyamines and their derivatives; salts thereof: Other: Diaminostilbene 2,2-disulphonic acid (Dasda)
Tariff item 2921 59 40 · Heading 2921 · Chapter 29, 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.
292159408 digits: 29 + 21 + 59 + 402921 59 40Diaminostilbene 2,2-disulphonic acid (Dasda)How 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 29 covers organic chemicals. It sits in Section VI, products of the chemical or allied industries.
Amine- function compounds.
Other. Between the heading and this item the tariff also prints the line “Aromatic polyamines and their derivatives; salts thereof”.
Diaminostilbene 2,2-disulphonic acid (Dasda). 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
2 entries of the GST rate notifications name this code's chapter or particular goods in its chapter, and they carry 5% or 18%. No single rate is stated for 29215940 here; read each entry's official description against your goods.
| Entry | Tariff column, as printed | Description, as printed | GST rate |
|---|---|---|---|
| Entries that cite 29; 29 or 3808 93 (this code's chapter) | |||
| Schedule I, S. No. 222Notification No. 9/2025-Integrated Tax (Rate)Central Tax: Notification No. 9/2025-Central Tax (Rate) | 29 or 3808 93 | Gibberellic acid | 5%IGST 5% · CGST 2.5% · SGST/UTGST 2.5%From 22 September 2025 |
| Schedule II, S. No. 36Notification No. 9/2025-Integrated Tax (Rate)Central Tax: Notification No. 9/2025-Central Tax (Rate) | 29 | All organic chemicals other than giberellic acid | 18%IGST 18% · CGST 9% · SGST/UTGST 9%From 22 September 2025 |
Each entry applies only to the goods it describes. If none describes your goods, the entry for goods not specified elsewhere applies: Schedule II, S. No. 639, 18%: “Goods which are not specified in Schedule I, III, IV, V, VI or VII”.
Rates are IGST on inter-State supplies; on supplies within a State the same rate is split equally between CGST and SGST/UTGST, under Notification No. 9/2025-Central Tax (Rate) with the same S. Nos.
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, 2921, on B2B tax invoices.
Above ₹5 crore, at least the sub-heading, 292159, goes on B2B tax invoices.
Many businesses show the full 29215940, the tariff item itself.
Rate history
Rate depends on the goods
Notification No. 9/2025-Integrated Tax (Rate) and No. 9/2025-Central Tax (Rate) dated 17.09.2025 (as corrected 18.09.2025), which superseded Notification No. 1/2017-Integrated Tax (Rate) dated 28.06.2017. The 2 entries in force from this date are listed in the GST rate section above.
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 2921, amine- function compounds. The codes below sit closest to 29215940 in the Customs Tariff of India: the other tariff items under heading 2921 and codes elsewhere in chapter 29. 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.
29211190Tariff item 2921 11 9029211400Tariff item 2921 14 0029212990Tariff item 2921 29 9029215160Tariff item 2921 51 6029215940, this page's code, is tariff item 2921 59 40 under the same heading.
29221990Heading 2922 · tariff item 2922 19 9029222160Heading 2922 · tariff item 2922 21 60Codes under other headings of chapter 29, organic chemicals. Each page shows that code's own heading and GST rate entries.
Questions
It depends on the goods: 2 entries of the rate notifications name this code's chapter or particular goods in its chapter, and they carry 5% or 18%: Schedule I, S. No. 222 (5%); Schedule II, S. No. 36 (18%). Each entry applies only to the goods it describes; if none describes your goods, Schedule II, S. No. 639 (18%) applies. The full wording of every entry is in the GST rate section above.
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 2921 or 292159; many businesses use the full 29215940.
Tariff item 2921 59 40 of the Customs Tariff of India, First Schedule: “Diaminostilbene 2,2-disulphonic acid (Dasda)”, under sub-heading 2921 59 (“Other”), the line “Aromatic polyamines and their derivatives; salts thereof”, heading 2921 (“Amine- function compounds”), in chapter 29 (organic chemicals), Section VI (products of the chemical or allied industries). 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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