3811Heading (4-digit)Section VI

HSN Code 3811 – Anti-Knock Preparations, Oxidation Inhibitors, Gum Inhibitors, Viscosity Improvers,…

Full GST classification for Anti-Knock Preparations, Oxidation Inhibitors, Gum Inhibitors, Viscosity Improvers,… — chapter, heading and tariff hierarchy, GST rate slabs and related HSN codes. Updated for India GST.

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HSN Code

3811

Chapter

38

Digits

4-digit

Section

VI

What is HSN Code 3811?

HSN code 3811 is the Harmonized System of Nomenclature classification for Anti-Knock Preparations, Oxidation Inhibitors, Gum Inhibitors, Viscosity Improvers,… under India's Goods and Services Tax (GST). It is a 4-digit code sitting at the heading (4-digit) level of the HSN hierarchy.

This code belongs to Chapter 38 — Miscellaneous Chemical Products, which is part of Section VI: Chemical Products. Every GST-registered business supplying anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers,… must quote HSN 3811 (or the digit-length required for its turnover) on tax invoices and in GSTR-1.

Classification breakdown of 3811

LevelCodeDescription
Chapter38miscellaneous chemical products
Heading3811anti-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 for HSN 3811

Goods under HSN 3811 attract GST at one of the five standard slabs. The exact rate depends on the specific product and the latest GST Council notification — always confirm before invoicing.

0%

Nil / Exempt

Fresh produce, milk, cereals, books

5%

Merit rate

Essentials, packaged food, transport

12%

Standard-low

Processed food, mobiles, apparel > ₹1,000

18%

Standard

Most goods, electronics, services

28%

Demerit / luxury

Cars, cement, aerated drinks, tobacco

Find the exact GST rate for Anti-Knock Preparations, Oxidation Inhibitors, Gum Inhibitors, Viscosity Improvers,… →

HSN Code 3811 — FAQs

What is HSN code 3811?

HSN code 3811 classifies "Anti-Knock Preparations, Oxidation Inhibitors, Gum Inhibitors, Viscosity Improvers,…" under India's GST regime. It falls under Chapter 38 (Miscellaneous Chemical Products) of the Harmonized System of Nomenclature.

How many digits is HSN code 3811?

3811 is a 4-digit HSN code — a heading (4-digit). Businesses declare 4-digit HSN (turnover up to ₹5 crore) or 6-digit HSN (above ₹5 crore) on GST invoices; 8-digit codes are used for exports and imports.

What is the GST rate for HSN code 3811?

Goods under HSN 3811 are taxed at one of the GST slabs — 0%, 5%, 12%, 18% or 28% — depending on the exact product and the latest GST Council notification. Use the Laabam.One GST Rate Finder to confirm the current rate for Anti-Knock Preparations, Oxidation Inhibitors, Gum Inhibitors, Viscosity Improvers,….

Which chapter does HSN code 3811 belong to?

HSN 3811 belongs to Chapter 38 — Miscellaneous Chemical Products, part of Section VI: Chemical Products.

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