Borax Appearance: white powder and granular Boron content: 15%min Characters: a white, crystalline powder Factory supply BoraxMolecular formula: Na2b4o7ยท10h2o Molecular weight: 381.36 Appearance: white powder and granular Boron content: 15%min Characters: a white, crystalline powder, colorless crystals or crystalline masses, efflorescent, soluble in water, very soluble in boiling water, freely ...