kalciumperoxid

Kalciumperoxid, or calcium peroxide, is an inorganic compound with the chemical formula CaO2. It appears as a white to off-white solid that is relatively stable at ambient conditions but slowly decomposes when exposed to moisture or heat. It is sparingly soluble in water and acts as an oxidizing agent.

Chemistry and properties

When calcium peroxide is added to water, it reacts to form calcium hydroxide and hydrogen peroxide, which then decomposes to water and oxygen. The overall effect is a slow, sustained release of oxygen, making calcium peroxide useful as an oxygen source in environments with limited aeration. The solid is classified as an oxidizer and should be handled with care to avoid contact with flammable or organic materials.

Production

Industrial production commonly involves reacting calcium hydroxide with hydrogen peroxide to yield calcium peroxide and water: Ca(OH)2 + H2O2 → CaO2 + 2 H2O. The resulting CaO2 is processed and packaged for commercial use, typically under moisture-controlled conditions to preserve stability.

Uses and applications

Calcium peroxide is used as a slow-release source of oxygen in agriculture, horticulture, aquaculture, and wastewater treatment. In soils and sediments, it can improve aeration and stimulate aerobic microbial activity. It is also employed in environmental remediation to supply oxygen to hypoxic environments, supporting natural biodegradation processes.

Safety and handling

As an oxidizer, calcium peroxide can intensify the combustion of organic materials. It should be stored in a dry, sealed container away from heat and incompatible substances. Protective equipment such as gloves and eye protection is recommended, and handling should avoid generating dust or producing friction with organic matter.

See also

Calcium oxide, hydrogen peroxide, environmental remediation.