HS code 3811: Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity
Heading 3811 of the EU Combined Nomenclature 2026, in chapter 38, with the official text of every 6-digit subheading and 8-digit CN code below it.
Official description
3811Anti-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
Place in the nomenclature: 38 Miscellaneous chemical products > 3811
Explanatory note (Eurostat)
Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives, for mineral oils, incl. gasoline, or for other liquids used for the same purposes as mineral oils
- Subheadings (6 digits)
- 5
- CN codes (8 digits)
- 6
Subheadings and CN codes in heading 3811
- 3811 11Anti-knock preparations | Based on lead compounds
Explanatory note (Eurostat): Anti-knock preparations for motor fuels based on lead compounds
- 3811 11 10 Based on tetraethyl-lead
- 3811 11 90 Other
- 3811 19Anti-knock preparations | Other
Explanatory note (Eurostat): Anti-knock preparations for motor fuels (excl. those based on lead compounds)
- 3811 19 00 Other
- 3811 21Additives for lubricating oils | Containing petroleum oils or oils obtained from bituminous minerals
Explanatory note (Eurostat): Prepared additives for oil lubricants containing petroleum oil or bituminous mineral oil
- 3811 21 00 Containing petroleum oils or oils obtained from bituminous minerals
- 3811 29Additives for lubricating oils | Other
Explanatory note (Eurostat): Prepared additives for oil lubricants not containing petroleum oil or bituminous mineral oil
- 3811 29 00 Other
- 3811 90Other
Explanatory note (Eurostat): Oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives for mineral oils, incl. gasoline, or for other liquids used for the same purposes as mineral oils (excl. anti-knock preparations and oil lubricant additives)
- 3811 90 00 Other
The first 6 digits are the Harmonized System, shared worldwide: a US HTS code that starts with the same 6 digits sits under the same subheading. The last 2 digits are the EU's own CN split.
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Not a binding classification
These pages show the official texts for reference. They are not a binding classification: check the code with your customs broker, or ask your customs authority for Binding Tariff Information (BTI).
Source
Source: EU Combined Nomenclature 2026 (Commission Implementing Regulation (EU) 2025/1926), © European Union, https://eur-lex.europa.eu/. Reformatted by WISEPIM: indent dashes removed and parent lines joined. Only the Official Journal is authentic.