Three crystal modifications (polymorphs) of Linezolid designated as Form A1, Form B1 and Form C1 have been obtained through recrystallization using organic solvents under different conditions. Thus obtained crystal forms of Linezolid were characterized by powder X-ray diffractometry (PXRD), differential scanning calorimetry (DSC), and thermo gravimetric analysis (TGA) and the data acquired proved the crystal forms to be different than the prior art forms.
