is the lowest temperature at which a specified quantity
of aniline (a benzene derivative) is soluble in a specified quantity
of a petroleum product, as determined by test method
ASTM-D-611;
hence, an empirical measure of the solvent power of a hydrocarbon -
the lower the aniline point, the greater the solvency. Paraffinic
hydrocarbons have higher aniline points than aromatic types.