3824.99.75—Naphthenic acids, their water-insoluble salts and their esters
General duty rate
3.7%
Across 2 10-digit lines
Plain-English explanation
HTS 3824.99.75 is an 8-digit tariff item of the U.S. Harmonized Tariff Schedule covering Naphthenic acids, their water-insoluble salts and their esters. It sits in Chapter 38: Miscellaneous chemical products, Section VI: Products of the Chemical or Allied Industries and rolls up 2 10-digit statistical lines, all with a general duty rate of 3.7%. 2 Chapter 99 tariff modifications currently touch one or more lines under this tariff item.
10-digit lines under 3824.99.75(2)
Pick a line to view full rate detail and compute landed duty
Tariff modifications(2)
Chapter 99 overlays touching one or more lines under 3824.99.75
| Code | Authority | Rate |
|---|---|---|
| 9903.88.01 | section_301 | The duty provided in the applicable subheading plus 25% |
| 9903.88.15 | section_301 | The duty provided in the applicable subheading + 7.5% |
Frequently asked questions
What does HTS 3824.99.75 cover?
HTS 3824.99.75 is an 8-digit tariff item of the U.S. Harmonized Tariff Schedule covering Naphthenic acids, their water-insoluble salts and their esters. It belongs to Chapter 38 and rolls up 2 10-digit statistical lines that brokers actually file at entry.
What is the duty rate for HTS 3824.99.75?
Every 10-digit line under HTS 3824.99.75 carries a general (Column 1) duty rate of 3.7%. Section 301, Section 232, and AD/CVD overlays may stack on top of this rate at the per-line level — open a specific 10-digit code to see its complete tariff stack.
How do I find the right 10-digit line under HTS 3824.99.75?
U.S. Customs requires entries to be filed at the 10-digit statistical level — the broader tariff item HTS 3824.99.75 is not directly fileable. Match your product description to the most specific 10-digit line in the list on this page; if multiple lines could apply, the General Rules of Interpretation (GRIs) and chapter notes determine which one governs.
Are there AD/CVD orders affecting HTS 3824.99.75?
Learn more
Tandom guides relevant to this code
Section 301 China tariff exclusions in 2026
What the 178 active Section 301 exclusions cover, how to claim 9903.88.69 on an entry, and what changes when the November 10, 2026 deadline passes.
Open resource
How Chapter 99 tariff layers stack on a single entry
How to read, order, and report Chapter 99 HTS codes alongside the base classification on a US entry summary in 2026. The full stacking ladder for brokers and compliance teams.
Open resource