The unit of second virial coefficient is

The unit of second virial coefficient is $m^{3}mo{l}^{-1}$.

The second virial coefficient, designated ${\mathrm{B}}_2$, gauges how much a protein solution deviates from the ideal state. The ability to predict or explain solubility, crystallization condition, aggregation propensity, and the critical temperature for liquid-liquid phase separation are all common applications.