... or soap packing,ceramic glaze materials and glass raw Borax decahydrate 99.5% CAS: 1303-96-4 Molecular Formula: Na2B4O7.10H2O, Molecular ... weight: 381.37, Appearance: White crystal powder, Assay: 99.5%min, B: 11.2%min, B2O3: 36.3%min CO3 ... , Molecular weight: 381.37, Appearance: White crystal powder, Assay: 99.5%min, B: 11.2%min, B2O3: 36.3%min CO3 ... .2%max, Cl: 0.05%max, Fe: 0.002%max. Borax