| 2901.10.30 | 00 | n-Pentane and isopentane | kg | Free | | 25% |
| 2901.10.40 | 00 | Other: | | | | |
| 2901.10.40 | 00 | Derived in whole or in part from petroleum, shale oil or natural gas | kg | Free | | 25% |
| 2901.10.50 | 00 | Other | kg | Free | | 25% |
| 2901.21.00 | 00 | Unsaturated: | | | | |
| 2901.21.00 | 00 | Ethylene | kg | Free | | Free |
| 2901.23.00 | 00 | Butene (Butylene) and isomers thereof | kg | Free | | Free |
| 2901.24 | | Buta-1,3-diene and isoprene: | | | | |
| 2901.24.10 | 00 | Buta-1,3-diene | kg | Free | | Free |
| 2901.24.20 | 00 | Having a purity of 95 percent or more by weight | kg | Free | | 25% |
| 2901.24.50 | 00 | Other | kg | Free | | 25% |
| 2901.29 | | Other: | | | | |
| 2901.29.10 | | Derived in whole or in part from petroleum, shale oil or natural gas | | Free | | 25% |
| 2901.29.10 | 50 | Other | kg | | | |
| 2901.29.50 | 00 | Other | kg | Free | | 25% |
| 2902.11.00 | 00 | Cyclanes, cyclenes and cycloterpenes: | | | | |
| 2902.19.00 | | Other | | Free | | 25% |
| 2902.19.00 | 10 | Dicyclopentadiene | kg | | | |
| 2902.19.00 | 50 | Other | kg | | | |
| 2902.30.00 | 00 | Toluene | liters | Free | | Free |
| 2902.50.00 | 00 | Styrene | kg | Free | | 15.4¢/kg + 45% |
| 2902.60.00 | 00 | Ethylbenzene | kg | Free | | 15.4¢/kg + 55% |
| 2902.90 | | Other: | | | | |
| 2902.90.20 | 00 | Acenaphthene, chrysene, cymene, dimethylnaphthalenes, fluoranthene, fluorene, indene, mesitylene, methylanthracene, methylnaphthalene, phenanthrene and pyrene | kg | Free | | Free |
| 2902.90.30 | 50 | Other | kg | | | |
Harmonized Tariff Schedule of the United States inquiry: low〈=
