Polymorphs appearing first supersaturated solution

Consequently, the selective production of crystals of a metastable type is desirable. Accordingly, it is necessary to study the crystallization behavior of the polymorph appearing first (primary nuclei) in a supersaturated solution. 

In this paper, correlating equations of solubility of QE in ethanol were proposed using previous data (2). Subsequently, in order to clarify the formation mechanism of polymorphs appearing first in a supersaturated solution, the solutions were cooled to a given temperature rapidly and the time required for... 

The type of polymorph appearing first from a supersaturated solution was considered... 

The induction time in homogeneous nucleation of a or p polymorphs of quizalofop-ethyl, i.e. the time the crystals first appeared in a supersaturated solution of quizalofop-e yl-ethanol mixtures was measured at temperatures between 293 and 31 IK in a batch stirred crystallizer. Experimental equations on the induction time have been derived semiquantitatively on the basis of an equation of classical nucleation rate. In addition, the concentration of supersaturated... 

The polymorphs of QE appearing first in the supersaturated solution are shown in Figure 2 together with the solubility lines of a and p calculated from equations 6. 

---