HSN Code 38111900 -- – Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improve (GST Rate 18%)

HSN Code 38111900

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 anti-knock preparations: other

HSN38111900

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 anti-knock preparations: other

18%
IGST
Schedule II
CGST9%
SGST/UTGST9%
CessNil
Heading: 3811
Subheading: 381119
Source: Notification No. 9/2025 - Central Tax (Rate)
Effective from: 2025-09-22
Last verified: 2026-06-03

When does this rate apply?

Use this HSN Code on tax invoices when supplying Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improve. GST is charged at 18% (IGST for inter-state, or CGST 9% + SGST 9% for intra-state). If the supply is exported under LUT, the rate is zero with no IGST charged.

This page is reviewed by CA Tirumalesh. For high-value or unusual transactions, confirm with the latest CBIC notification or consult a chartered accountant before invoicing.

Frequently asked questions

What is HSN Code 38111900?
HSN Code 38111900 is the official Harmonized System of Nomenclature code for Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and othe, as per the CBIC GST rate schedule.
What is the GST rate for HSN Code 38111900?
HSN Code 38111900 attracts GST at 18% (IGST). For intra-state supplies, this is split as CGST 9% + SGST 9%. As per Notification No. 9/2025 - Central Tax (Rate).
Which chapter does HSN Code 38111900 belong to?
HSN Code 38111900 falls under Chapter 38 -- Miscellaneous chemical products of the GST tariff.
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