... .borax:CAS NO :1303-96-4 Byname: Sodium borate ,borascu ,decahydrate,Sodium tetraborate decahydrateAppearance :White powder crystalMolecular Formula :Na2B4O7·10H2OMolecular Weight :381.37 UN ... flux in metallurgical industry, fire-proofing compositions and linings for safes; Also for pigments; Enamel paints, paper glazes, cosmetics, soaps, textiles, medicines ...