Analysis
HTS 3815.19.00 covers supported catalysts: other under heading 3815 (reaction initiators, reaction accelerators and catalytic preparations, not elsewhere…).
This line's footnotes point to one additional provision in Chapter 99: 9903.90.08 (measures on products of Russia). Chapter 99 duties are added on top of the general rate for goods of the countries they name, and they change more often than the rest of the schedule, so check the current CBP guidance before you rely on a total.
Rates on the nearby lines range from duty-free to 6.5%. The costliest confusion would be with 3815.90.10 (of bismuth, of tungsten or of vanadium) at 6.5%, a difference of 6.5 points on the customs value.
There is no general-rate duty on this line, which puts it with roughly 25% of the 179 tariff lines in chapter 38 that are also free. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.
Goods from countries without normal trade relations pay the column 2 rate of 25% instead of nothing, so origin decides between free entry and a 25% duty.
Neighbouring lines
| Line | Description | General rate |
|---|---|---|
| 3815.11.00 | With nickel or nickel compounds as the active substance | Free |
| 3815.12.00 | With precious metal or precious metal compounds as the active substance | Free |
| 3815.90.10 | Of bismuth, of tungsten or of vanadium | 6.5% |
| 3815.90.20 | Of mercury or of molybdenum | 2.8% |
| 3815.90.30 | Consisting wholly of inorganic substances: other | Free |
| 3815.90.50 | Other: other | 5% |
Chapter 99 provisions in the footnotes
- 9903.90.08 measures on products of Russia
Articles the product of the Russian Federation, as provided for in U.S. note 30(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 30(b) to this subchapter