Q3HSN Code 2809
Diphosphorus pentaoxide; phosphoric acid
Diphosphorus pentaoxide; phosphoric acid; polyphosphoric acids, whether or not chemically defined
GST rate
5%
Codes under 2809
| Code | Description | GST rate |
|---|---|---|
| 2809 10 | Diphosphorus pentaoxide | 5% |
| 2809 20 | Phosphoric acid and polyphosphoric acids: | 5% |
| 2809 20 10 | Phosporic acid | 5% |
| 2809 20 20 | Polyphosphoric acids | 5% |
← Chapter 28: Industrial gases and inorganic chemicals
Related HSN codes
Frequently Asked Questions
What is the HSN code for diphosphorus pentaoxide; phosphoric acid?
The HSN code for diphosphorus pentaoxide; phosphoric acid is 2809, under Chapter 28 (Industrial gases and inorganic chemicals).
What is the GST rate on diphosphorus pentaoxide; phosphoric acid?
Diphosphorus pentaoxide; phosphoric acid is taxed at 5% GST under HSN code 2809.
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.