Commercial samples can be yellowish, but the pure compound is white.

It is mainly used as an oxidant to enhance the extraction of precious metals from their ores.

Also, calcium peroxide has found use in aquaculture to oxygenate and disinfect water.

It is used to restore soil and groundwater contaminated with petroleum by the process of enhanced in-situ bioremediation.

It is also used for curing polythioether polymers by oxidising terminal thiol groups to disulphide bridges.