HS HEADING 3811

Anti-knock preparations, oxidation and gum inhibitors, viscosity improvers, anti-corrosive preparations and the like, for mineral oils (including gasoline) or other liquids used for the same purposes

HEADING

3811

CHAPTER

In plain English

This category covers chemical products designed to improve mineral oils and similar liquids, such as gasoline, by preventing engine knocking, reducing oxidation and gum formation, improving viscosity, and stopping corrosion. The items are split into groups based on their specific function and composition. One group includes anti-knock preparations, distinguishing between those containing lead compounds and those that do not. Another group covers lubricating oil additives, separating those made with petroleum or bituminous mineral oils from those that are not. The final group captures other prepared additives for these liquids that do not fit into the previous specific categories.

PARAPHRASE OF THE OFFICIAL HS 2022 TEXTS BELOW — NOT LEGAL ADVICE

6-digit subheadings (5)

Official HS 2022 subheading texts. National tariff schedules subdivide these further (8-10 digit lines) and set the actual duty rates.

3811.11

Anti-knock preparations; based on lead compounds

3811.19

Anti-knock preparations; other than those based on lead compounds

3811.21

Lubricating oil additives; containing petroleum oils or oils obtained from bituminous minerals

3811.29

Lubricating oil additives; not containing petroleum oils or oils obtained from bituminous minerals

3811.90

Oxidation and gum inhibitors, viscosity improvers, anti-corrosive preparations, other prepared additives for mineral oils or liquids used as mineral oils (including gasoline), n.e.c. in heading no. 3811

Chapter 38 classification notes

Chapter 38 includes pesticides (3808) which are subject to FAO Rotterdam Convention prior-informed-consent for many active ingredients. Diagnostic reagents (3822) often dual-classified with Chapter 30 medicines.

Frequent misclassification in this chapter

Insect repellent (DEET) — depending on form, 3808 (commercial pesticide) vs. 3304 (cosmetic preparation).

Classification certainty

The 6-digit level shown here is the internationally harmonised layer. Duty rates attach to national 8-10 digit tariff lines, which differ by country — use the duty calculator for lane estimates. For binding certainty, request a ruling from the destination customs authority.

Binding tariff ruling database

Other headings in Chapter 38

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