Code 3811 11 · Heading 3811

Lead-compound anti-knock preparations for petrol

This covers prepared anti-knock products for petrol that are based on lead compounds. It includes products based on tetraethyl lead as well as products based on other lead compounds.

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Official tariff text

Anti-knock preparations for motor fuels based on lead compounds

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Step 4 of 4

Step 1 · Section VI Products of the chemical or allied industries
Is it an inorganic or organic chemical; a pharmaceutical product; a fertilizer; a tanning or dye extract, pigment, paint, varnish, filler or printing ink; an essential oil, perfume, cosmetic or toilet product; soap, a surface-active, washing, cleaning, polishing or wax product; a protein, modified starch, glue or enzyme; an explosive, pyrotechnic article, match or other specified combustible material; a photographic or cinematographic product; or another chemical product?
✓
Step 2 · Chapter 38 Miscellaneous chemical products 11 of 11 chapters in section VI
Which specific product type is it: a carbon or mineral product, resin or terpentine product, pesticide, textile, paper or leather treatment, soldering or welding preparation, oil or fuel additive, rubber or plastic additive, fire-extinguishing preparation, solvent or paint remover, catalyst, refractory product, alkylbenzene or alkylnaphthalene mixture, doped electronic material, hydraulic fluid, antifreeze or de-icing liquid, culture substrate, diagnostic or laboratory reagent, fatty acid or fatty alcohol, foundry binder or other chemical preparation, chemical waste, biodiesel, or a mixture containing halogenated methane, ethane or propane derivatives?
✓
Step 3 · Heading 3811 Anti-knock preparations, oxidation inhibitors, gum … 11 of 27 headings under chapter 38
Is it a gasoline anti-knock preparation, a lubricating-oil additive, or another prepared additive for mineral oils or liquids used for the same purposes—and, if it is a gasoline anti-knock preparation or lubricating-oil additive, does it have the stated lead-compound or petroleum-oil content?
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Step 4 · Subheading 3811 11 Anti-knock preparations for motor fuels based on le… 1 of 5 subheadings under heading 3811
Is the petrol anti-knock preparation based on tetraethyl lead, or on other lead compounds?

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2 codes below this one

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3811 11 Anti-knock preparations for motor fuels based on lead compounds you are here 5.8–6.5%
3811 19 Anti-knock preparations for motor fuels (excl. those based on lead compounds) 5.8%
3811 21 Prepared additives for oil lubricants containing petroleum oil or bituminous mineral oil 5.3%
3811 29 Prepared additives for oil lubricants not containing petroleum oil or bituminous mineral oil 5.8%
3811 90 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) 5.8%

Export to Norway

What Norwegian customs charges when goods like these are imported into Norway.

38.11.1100

Based on lead compounds

Ordinary duty

Duty free

Goods of EU origin

Duty free You need documentation of EU origin to use this rate.

Norwegian tariff data version 1.5/1.2, last checked Aug. 9, 2026.

Contains data from Norwegian Customs (data.toll.no), licensed under CC BY 4.0, adapted for display.

Export to the United Kingdom

What UK customs charges when goods like these are imported into the UK.

3811 11 10 00

Based on tetraethyl-lead

Ordinary duty

6.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.
3811 11 90 00

Other

Ordinary duty

4.0%

Goods of EU origin

Duty free You need documentation of EU preferential origin to use this rate.

These rates apply in Great Britain. Different rules may apply for goods entering Northern Ireland.

UK tariff data version v4.0.1576, last checked Aug. 3, 2026.

Contains public sector information licensed under the Open Government Licence v3.0.

Source: UK Department for Business and Trade (data.api.trade.gov.uk).

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See all 5 codes at this level

you are here 3811 11

Anti-knock preparations for motor fuels based on lead compounds

Next code 3811 19

Anti-knock preparations for motor fuels (excl. those based on lead co…

Duty rates shown here are estimates, read from official EU / Danish, Norwegian and UK tariff data for orientation only. Confirm the current rate with SKAT, TARIC, Norwegian Customs or the UK Online Trade Tariff before you file. The rate you pay can also depend on the country of origin. These are base customs duties only: import VAT, excise duties, anti-dumping duties and safeguard or quota measures are not included.