Hydrogen peroxide is a chemical compound with the formula H2O2. In its pure form, it is a very pale blue, clear liquid, slightly more viscous than water. It is used as an oxidizer, bleaching agent, and antiseptic. Concentrated hydrogen peroxide has also been used as a propellant in rocketry.
Hydrogen peroxide is unstable and slowly decomposes in the presence of light. Because of its instability, it is typically stored with a stabilizer in a weakly acidic solution. Hydrogen peroxide is found in biological systems including the human body.
Hydrogen peroxide is a powerful, environmentally friendly industrial oxidant, which (in contrast to other common oxidizing agents) produces only water as a by-product. Hydrogen peroxide is primarily used for bleaching paper and textiles, in chemical synthesis, and is increasingly being used to treat industrial waste.
Sodium percarbonate is a chemical substance with formula Na2H3CO6. It is an addition compound of sodium carbonate (“soda ash” or “washing soda”) and hydrogen peroxide.
Sodium percarbonate is a colourless, crystalline, hygroscopic and water-soluble solid. It is sometimes abbreviated as SPC. It contains 32.5% by weight of hydrogen peroxide.
As an oxidizing agent, sodium percarbonate is an ingredient in a number of home and laundry cleaning products, like laundry detergent, dishwashing detergent, bleach and laundry additives. It is also used as a laboratory source of anhydrous hydrogen peroxide.