Borax pentahydrate

Borax pentahydrate (CAS 12179-04-3) is an inorganic boron salt commercially available under trade names including Neobor, Etibor 48, Fertibor, and Granubor. It is the pentahydrate form of sodium tetraborate, supplying both sodium and borate ions in aqueous solution across a broad range of industrial processes.

In cleaning formulations, borax pentahydrate raises pH to saponify oils and enhances surfactant performance, while in fiberglass and cellulose insulation manufacturing it acts as a flame retardant by forming a glassy borate char layer that interrupts combustion. In agriculture, it serves as a soluble boron micronutrient source, correcting boron deficiency in crops during soil or foliar application.

Borax pentahydrate is supplied in technical and agricultural grades as crystalline powder or granules, with packaging typically in 25 kg bags or bulk. It is subject to REACH registration and classified under CLP regulations; procurement teams should confirm SDS compliance and grade specification prior to sourcing.