HTS 3811.19.00 duty rate

Antiknock preparations: Other. General duty 6.5%; for goods of Chinese origin, general + Section 301 (+25%) comes to 31.5% before any other duties.

6.5%General (MFN) duty rate

List 3 +25%Section 301, products of China

31.5%General + Section 301 for China, ad valorem

3.7¢/kg + 60%Column 2 (Cuba, North Korea, Russia, Belarus)

Official USITC Harmonized Tariff Schedule, 2026HTSRev20 · data built 2026-10-02 · check on hts.usitc.gov

Tariff line	3811.19.00
Description	Antiknock 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: › Antiknock preparations: › Other
General rate	6.5%
Special rate (trade programs)	Free (A+,AU,BH,CL,CO,D,E, IL,JO, KR,MA,OM,P, PA,PE,S,SG)
Column 2 rate	3.7¢/kg + 60%
Units of quantity	kg
Section 301 (China)	List 3 +25%

Section 301 China tariffs on this line

Chapter 99 heading	List	Extra duty	Status
9903.88.03	List 3	+25%	in effect

2026 US–China tariff reduction lists: The US–China reduction lists are not published yet. Dutyfinch checks the Federal Register every day and flags each code as soon as the list appears.

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Nearby tariff lines

3811.11.10 · 3811.11.50 · 3811.21.00 · 3811.29.00 · 3811.90.00

← 3811.11.50 · 3811.21.00 → · Heading 3811 · Chapter 38 · Chapter 38 rate summary

General information from the official US Harmonized Tariff Schedule (USITC) and Federal Register; not legal or customs advice. Section 232, IEEPA, antidumping/countervailing and other duties can also apply. Confirm classification and rates with CBP or a licensed customs broker before you file.