More examples. 1  The police have called off the search for the missing child until dawn tomorrow. 2  The missing letter eventually turned up inside a book. 3  A search party was sent out to look for the missing climbers. 4  All of the ship's crew are missing, believed dead. 5  This jigsaw puzzle has two pieces missing.
A highly concentrated source of boric oxide for glazes. Anhydrous borax is made by burning or fusing hydrated borax. It thus contains little or no water of crystallization (conversation ratio of .53 compared to hydrated decahydrate borax) and does not rehydrate under normal storage conditions. Anhydrous borax is water soluble, but considerably less so than raw borax (in aqueous solution it can provide slow release of boron).
For sodium perborate, see Sodium perborate. Borax, also known as sodium borate, sodium tetraborate, or disodium tetraborate, is an important boron compound, a mineral, and a salt of boric acid. Powdered borax is white, consisting of soft colorless crystals that dissolve easily in water.Borax has a wide variety of uses.It is a component of many detergents, cosmetics, and enamel glazes.orax, sodium tetraborate decahydrate, according to one study, is not acutely toxic. Its LD50 (median lethal dose) score is tested at 2.66 g/kg in rats, meaning that a significant dose of the chemical is needed to cause severe symptoms or death. The lethal dose is not necessarily the same for humans.