Abstract
Iron colloid for intravenous injection was successfully prepared by the use of sodium chondroitinsulfate as the stabilizer. In order to examine the nature of this. colloid, comparative examinations were made with iron colloids using other kind of stabilizers. Liberation of ferric ion from various kinds of iron colloid in aqueous solution of various pH was examined, and the behavior of iron in the body was followed by intravenous injection of iron colloid labelled with 59Fe, in rabbits. A certain correlation was found between these in vitro and in vivo experiments.