We aim to prepare monodispersed and homogenous spherical particles of pure Fe 76 Si 9 B 10 P 5 metallic glass with a low content of nucleation sites, and to evaluate the intrinsic glass-forming ability of Fe 76 Si 9 B 10 P 5 alloys by containerless solidification. Monodispersed Fe 76 Si 9 B 10 P 5 particles were successfully prepared by our originally developed pulsated orifice ejection method under He and Ar gas atmosphere. All obtained particles, with diameters ranging from 313 to 664μm, were identified as single glassy or amorphous phases by X-ray diffraction, differential scanning calorimetry, and transmission electron microscopy. The critical cooling rate to form the fully glassy or amorphous phase was estimated in less than 550K/s by a Newtonian cooling model. The results show that the Fe 76 Si 9 B 10 P 5 alloy has sufficient glass-forming ability under restrained nucleation conditions.