| 290123 | Acyclic hydrocarbons.-Butene (butylene) and isomers thereof |
| 290124 | Acyclic hydrocarbons.-Buta-1,3-diene and isoprene |
| 290129 | Acyclic hydrocarbons.-Other |
| 290211 | Cyclic hydrocarbons.-Cyclohexane |
| 290219 | Cyclic hydrocarbons.-Other |
| 290220 | Cyclic hydrocarbons.-Benzene |
| 290230 | Cyclic hydrocarbons.-Toluene |
| 290241 | Cyclic hydrocarbons.-o-Xylene |
| 290242 | Cyclic hydrocarbons.-m-Xylene |
| 290243 | Cyclic hydrocarbons.-p-Xylene |
| 290244 | Cyclic hydrocarbons.-Mixed xylene isomers |
| 290250 | Cyclic hydrocarbons.-Styrene |
| 290260 | Cyclic hydrocarbons.-Ethylbenzene |
| 290270 | Cyclic hydrocarbons.-Cumene |
| 290290 | Cyclic hydrocarbons.-Other |
