Equation ( ) to (13) allows to theoretically obtain, tind, and Nm/V for each of the cooling rate provided we have the experimentally obtained information on the MSZW (i.e., Tmax) and theoretically obtained nucleation rate J (which can be obtained eq (2) and eq (7)). From equations ( ) and ( ), it can be understood that the induction time is defined as the ratio of the metastable zone width to the cooling rate. In this context, the induction time represents the duration required to observe nucleation at 𝑇 * starting from 𝑇 * . The calculated tind and Nm/V calculated using equation ( ) and ( ) are given in Table . Clearly for all the APIs studied, at the MSZW, the Nm/V was found to be equal to 10 24 to 10 27 molecules/m 3 .