Indium hydroxide powders were synthesized using indium nitride, and the characteristics of the indium hydroxide powder were investigated according to the precipitate aging time and the pH and concentration of the liquid synthesis medium. Indium hydroxide (In(OH)3) and indium oxide hydroxide (InOOH) phases co-existed in all conditions studied here. The crystallite size of In(OH)3 was more dependent on the concentration and pH of the reaction medium compared to that of InOOH. Hence, the relative crystallite scale of In(OH)3 increased with increasing concentration and pH of the reaction liquid more than that of in InOOH. Although the crystallite size did not change much with an increase of precipitate aging time, the specific surface area decreased greatly. Such results can aid in the synthesis of indium oxide particles that are used for producing ITO targets

Keywords: Indium hydroxide, Indium oxide hydroxide, Precipitation, Raw material