When borax (sodium tetraborate decahydrate) is dissolved in water, it yields a saturated solution of sodium tetraborate. This solution is commonly known as borax water or sodium borate solution. The chemical formula for sodium tetraborate is Na2B4O7·10H2O. Borax water is a versatile substance with various industrial and household applications, such as a flux in soldering, a fire retardant, a cleaning agent, and a fertilizer. It is also used as an ingredient in the manufacture of glass, ceramics, and laundry detergents.