About HSN Code 3811

HSN Code 3811 covers 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 and attracts a GST rate of 18%. For intra-state supplies, this is split as 9% CGST + 9% SGST. For inter-state supplies, 18% IGST is charged.

How to Use HSN Code 3811 on GST Invoices

• Include the HSN code 3811 on every GST invoice for 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
• Businesses with turnover above ₹5 crore must use 6-digit HSN codes
• Turnover between ₹1.5–5 crore: 4-digit codes are sufficient
• The HSN code must match the product/service description on your invoice
• Incorrect HSN codes can lead to GST notices and ITC mismatches

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