How is cobaltous trihydroxide (CAS: 1307-86-4) typically synthesized?

Cobaltous trihydroxide is typically synthesized by reacting a cobalt(II) salt with an excess of sodium hydroxide. This process leads to the formation of a precipitate of cobaltous hydroxide. The reaction is usually conducted in an aqueous medium, and the product can be isolated by filtration and drying. Proper catalysts and conditions are essential for achieving high yield and selectivity.