Analysis
Heading 2819 of the Harmonized Tariff Schedule covers chromium oxides and hydroxides. It divides into 2 six-digit subheadings and 2 eight-digit tariff lines, with 2 ten-digit statistical suffixes below them.
None of its 2 lines is duty-free at the general rate. Rates run from 3.7% to 3.7% with a median of 3.7%, so the line you choose sets the duty.
The largest subheadings are 2819.10 (unnamed, 1 line) and 2819.90 (unnamed, 1 line).
Its median rate of 3.7% sits at the 67th percentile of the headings in chapter 28.
By Census's concordance, most of its statistical lines are made by Other Basic Inorganic Chemical Manufacturing (325180). Those are the NAICS industries a US producer of these goods would report under.
The heading text decides whether a product belongs here at all (General Rule of Interpretation 1); the subheadings and lines below it only apply once that is settled. Section and chapter notes can override the heading wording, so read them for borderline goods.
Tariff lines
| Line | Description | General rate |
|---|---|---|
| 2819.10.00 | Chromium oxides and hydroxides: chromium trioxide | 3.7% |
| 2819.90.00 | Chromium oxides and hydroxides: other | 3.7% |