# 381121 — Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity…: Containing petroleum oils or oils obtained from bituminous minerals

HS code 381121 classifies Anti-knock preparations, oxidation inhibitors, gum inhibitors, viscosity…: Containing petroleum oils or oils obtained from bituminous minerals. It belongs to Chapter 38 (Miscellaneous chemical products) of Section VI (Products of the chemical or allied industries) of the Harmonized System. Duty rates are recorded for 1 country.

> Section VI · Products of the chemical or allied industries
> Chapter 38 · Miscellaneous chemical products

**HS code:** `381121`

## 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 : Additives for lubricating oils : Containing petroleum oils or oils obtained from bituminous minerals

## Duty rates

| Country | Rate | Programme |
| --- | --- | --- |
| US United States | 6.5% | MFN |

Rates effective as of 2026-01-01.

---
Source: https://hscode.eximagent.ai/38/381121
Last updated: 2026-06-03
Find importers, tariffs and sanctions for 381121 with EximAgent — https://eximagent.ai