| Most horticultural oils contain naphthene and paraffin compounds. |
| Its chemical composition consists of a great variety of chemical components, which can be classified as asphaltenes, polar aromatics, naphthene aromatics and saturates. |
| Oils containing naphthene are less pesticidal and more likely to injure plants than paraffinic types. |
| Oils high in naphthene also contain more impurities such as phytotoxic aromatic and unsaturated hydrocarbons. |
