Chapter 38: Miscellaneous chemical products
HTS heading 3811: Antiknock preparations, oxidation inhibitors, gum inhibitors, viscosity improvers, anti-corrosive preparations and other prepared additives…
8 numbered lines under heading 3811, including 6 10-digit statistical lines. The first six digits are the international HS subheading; the general column is the normal US duty rate.
| HTS code | Description | Unit | General | Special | Column 2 |
|---|---|---|---|---|---|
| 3811 | 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: | |||||
| 3811.11 | Based on lead compounds: | ||||
| 3811.11.10.00 | Based on tetraethyl lead or on a mixture of tetraethyl lead and tetramethyl lead | kg | Free | 30% | |
| 3811.11.50.00 | Other | kg | Free | 25% | |
| 3811.19.00.00 | Other | kg | 6.5% | Free (A+,AU,BH,CL,CO,D,E, IL,JO, KR,MA,OM,P, PA,PE,S,SG) | 3.7¢/kg + 60% |
| Additives for lubricating oils: | |||||
| 3811.21.00.00 | Containing petroleum oils or oils obtained from bituminous minerals | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO,KR,MA,OM,P, PA,PE,S,SG) | 60% |
| 3811.29.00.00 | OtherNote: See 9903.90.08. | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO,KR,MA,OM,P, PA,PE,S,SG) | 25% |
| 3811.90.00.00 | Other | kg | 6.5% | Free (A+,AU,BH,CL,CO,D, E,IL, JO,KR,MA,OM,P, PA,PE,S,SG) | 3.7¢/kg + 60% |
Statistical (10-digit) lines without a rate use the rate of the 8-digit line above them. Additional duties such as Section 301 and Section 232 may apply; check them with the tariff checker.
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Request a free auditSource: Harmonized Tariff Schedule of the United States, 2026 HTS Revision 20 (effective 2026-09-28), U.S. International Trade Commission (hts.usitc.gov), imported 2026-10-07. Reference only; not legal or customs advice or a binding classification. Additional duties under Chapter 99 may apply. ShipWave is not affiliated with the USITC or U.S. Customs and Border Protection.