ʻO ka sodium tetraborate (Sodium tetraborate, borax, borax, borax, E285) he paʻakai ia o ka waika boric nāwaliwali a me kahi kumu ikaika, kahi hui boron maʻamau, he mau hydrates kristal. Huina kemika Na2B4O7.
Hoʻohana ʻia ka Sodium tetraborate ma ke ʻano he detergents a me nā cosmetics; i ka pepa a me nā ʻoihana lāʻau lapaʻau; i ka hana ʻana i nā enamels, aniani, aniani a me nā aniani kala; ma ke ʻano he disinfectant a me kahi preservative.