| abstract |
An ionic liquid having excellent lubricity, a lubricant having excellent lubricity, and a magnetic recording medium having excellent practical characteristics are provided. An ionic liquid formed from a Bronsted acid (HX) and a Bronsted base (B) is contained, and the Bronsted base has a linear hydrocarbon group having 10 or more carbon atoms. The lubricant has a difference between the pKa of the Bronsted acid in water and the pKa of the Bronsted base in water of 12 or more. [Selection] Figure 1 |