Q3HSN Code 3811
Anti-knock preparations, oxidation inhibitors, gum
Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including gasoline) or for other liquids used for the same purposes as mineral oils
GST rate
18%
Codes under 3811
| Code | Description | GST rate |
|---|---|---|
| 3811 11 | Based on lead compounds | 18% |
| 3811 19 | Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including gasoline) or for other liquids used for the same purposes as mineral oils › Other | 18% |
| 3811 21 | Containing petroleum oils or oils obtained from bituminous minerals — anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including gasoline) or for other liquids used for the same purposes as mineral oils | 18% |
| 3811 29 | Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including gasoline) or for other liquids used for the same purposes as mineral oils › Other | 18% |
| 3811 90 | Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils (including gasoline) or for other liquids used for the same purposes as mineral oils › Other | 18% |
← Chapter 38: Insecticides and other miscellaneous chemical products
Related HSN codes
3812Prepared rubber accelerators3810Pickling preparations for metal surfaces, fluxes and other3813Preparations and charges for fire-extinguishers3809Finishing agents, dye carriers to accelerate the dyeing3814Organic composite solvents and thinners, not elsewhere3808Insecticides, rodenticides, fungicides, herbicides
Frequently Asked Questions
What is the HSN code for anti-knock preparations, oxidation inhibitors, gum?
The HSN code for anti-knock preparations, oxidation inhibitors, gum is 3811, under Chapter 38 (Insecticides and other miscellaneous chemical products).
What is the GST rate on anti-knock preparations, oxidation inhibitors, gum?
Anti-knock preparations, oxidation inhibitors, gum is taxed at 18% GST under HSN code 3811.
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.