The lowest temperature at which equal parts of aniline and a sample of oil are completely miscible, or the temperature at which the mixture becomes turbid or cloudy.
A product with a high aniline point will be low in aromatics and naphthenes and high in paraffins.
Aniline point is often specified for spray oils, cleaning solvents, and thinners, where effectiveness depends upon aromatic content.
The Aniline Number in conjunction with API gravity can be used to calculate the net heat of combustion for aviation fuels.
Subjects: Mechanical Engineering