Two CdGeAs2 samples have been successfully grown under microgravity on SPACEHAB-SH04 during the STS-77 Space Shuttle Endeavour mission. One polycrystalline and one single crystal CdGeAs2 feed rods with 9 mm diameter were processed by the float-zone method. An eutectic salt of LiCl and KCl was used as an encapsulant to suppl ess Cd and As evaporation from the melt. Numerical modeling of the float zone shows that salt encapsulation plays an important role in reducing Marangoni convection. The interface between the salt and CdGeAs2 was shown not to deform in the float zone due to the weak capillary pressure.