Analysis
Heading 2901 of the Harmonized Tariff Schedule covers acyclic hydrocarbons. It divides into 6 six-digit subheadings and 12 eight-digit tariff lines, with 13 ten-digit statistical suffixes below them.
Every one of its 12 tariff lines is duty-free at the general rate, so classification within the heading affects statistics and Chapter 99 measures rather than the base duty.
Its median rate of duty-free sits at the 13th percentile of the headings in chapter 29.
The largest subheadings are 2901.10 (saturated, 4 lines), 2901.24 (buta-1,3-diene and isoprene, 3 lines), 2901.29 (other, 2 lines) and 2901.21 (unnamed, 1 line).
By Census's concordance, most of its statistical lines are made by Petrochemical Manufacturing (325110) and All Other Basic Organic Chemical Manufacturing (325199). 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 |
|---|---|---|
| 2901.10.10 | Saturated: ethane and butane | Free |
| 2901.10.30 | n-Pentane and isopentane | Free |
| 2901.10.40 | Derived in whole or in part from petroleum, shale oil or natural gas | Free |
| 2901.10.50 | Other: other | Free |
| 2901.21.00 | Unsaturated: ethylene | Free |
| 2901.22.00 | Propene (Propylene) | Free |
| 2901.23.00 | Butene (Butylene) and isomers thereof | Free |
| 2901.24.10 | Buta-1,3-diene and isoprene: buta-1,3-diene | Free |
| 2901.24.20 | Having a purity of 95 percent or more by weight | Free |
| 2901.24.50 | Isoprene: other | Free |
| 2901.29.10 | Derived in whole or in part from petroleum, shale oil or natural gas | Free |
| 2901.29.50 | Other: other | Free |