In addition to hydrogen peroxide itself, a number of derivatives are also used. When H₂O₂ reacts with sodium carbonate (soda), the solid adduct sodium percarbonate is formed. On account of its outstanding properties, this adduct is used as a bleaching agent in heavy-duty laundry detergents and as a bleaching and disinfectant in dishwashing detergents. Another “solid hydrogen peroxide” is percarbamide, a compound of H₂O₂ and urea, which is used for bleaching hair and teeth. An especially important H₂O₂ derivative is peracetic acid, which is actually an equilibrium mixture of acetic acid, hydrogen peroxide, and peracetic acid. Because of their strong germicidal effect, various formulations are primarily used for disinfection processes in the food industry and for animal hygiene, laundry disinfection, and environmental applications.