HS code 381119: Anti-knock Preparations
- Covers:
- Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers… not listed under the other codes in this heading.
- Not covered:
- 381111 (Anti-knock preparations — Based on lead…); 381121 (Additives for lubricating oils — Containing…); 381129 (Additives for lubricating oils — Other); and others.
- Listed US duty:
- 6.5% (US general rate, HTS 2026)
Official description
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
Find or check your HS code
Suggestions from the HS index, not a customs ruling
Describe what you ship: what it is, what it is made of, how it is processed and what it is used for. I narrow it down against the real HS hierarchy, or check a code you were given.
What 381119 covers and what it doesn’t
Official text: 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.
This is the “other” line of heading 3811 (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). It takes goods of that heading that no more specific subheading names. These go elsewhere:
Nearby codes to check
- Heading 3811 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: every subheading side by side.
US duty rate
6.5%
General (MFN) rate in the US Harmonized Tariff Schedule, 2026 edition. A range means the rate depends on the 8-digit US line your product falls under. Extra duties such as Section 301, Section 232 or anti-dumping orders can apply on top, depending on origin. Check the lines on hts.usitc.gov. Not legal advice.
Common questions
- What is HS code 381119?
- 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
- What duty rates apply to 381119?
- Listed duty rates range from 6.5% across 1 country rate.
Browse all of Chapter 38: Miscellaneous chemical products →
Go beyond the code
Find the companies shipping under 381119 in the company directory, or classify and check duty with the CLI.