| Share | Phrase |
|---|
| 31.21% | naphthenic [physical/chemical] oil |
| 21.50% | naphthenic [physical/chemical] type |
| 17.51% | naphthenic [physical/chemical] base |
| 11.94% | naphthenic [physical/chemical] species |
| 9.01% | naphthenic [physical/chemical] crude |
| 4.59% | naphthenic [physical/chemical] acid |
| 4.20% | naphthenic [physical/chemical] compound |