Naphthenic Oils Review
Naphthenic oils. In contrast to
paraffinic oils, naphthenic oils are distinguished by a
molecular structure composed of rings of hydrocarbons,
i.e., the hydrogen and carbon atoms are linked in a circular
These oils do not contain wax and behave
differently than paraffinic oils. Naphthenic oils have:
Lower pour point due to absence of wax.
Lower viscosity indexes.
Higher volatility (lower flash point).
Higher specific gravities.
Naphthenic oils are generally reserved for
applications with narrow temperature ranges and where a low
pour point is required.