Melt Suspension Crystallization (MSC) is a technique, that can be used for large scale separation and ultrapurification of organic compounds. Because of the high selectivity of crystallization, the moderate operating conditions, and the relatively low latent heat of fusion, the energy consumption of these kind of processes is low. Furthermore, the use and regeneration of toxic or explosive solvents can be avoided. Thus, MSC can be regarded as an environmentally and economically promising technique for wide industrial application. In MSC crystals are grown from a melt, that contains impurities of up to 30 wt%. The