English name: Sodium tetraborate decahydrate; Borax decahydrate; Sodium borate decahydrate Other names: Borax; Yellow Moon sand; Moonstone; Sodium borate CAS number: 1303-96-4 Na2B4O7Â·10H2O=381.37 Grade: AR Content: â‰¥99.5% Calcium : â‰¤ 0.005% Phosphate: â‰¤ 0.002% Sulfate: â‰¤ 0.01% Chloride: â‰¤ 0.002% Lead: â‰¤ 0.001% Insoluble matter: â‰¤ 0.005% Iron: â‰¤ 0.0003% Clarity test: Qualified copper: â‰¤ 0.001% traits: Colorless hard crystalline particles or white crystalline powder. Odorless. Weathered in dry air. At 100 Â° C, 5 molecules of crystal water were lost, 9 molecules of crystal water were lost at 150 Â° C, and an anhydrate was formed at 320 Â° C. 1 g is dissolved in 16 ml of water, 0.6 ml of boiling water, about 1 ml of glycerin, and is insoluble in ethanol. The aqueous solution reacts alkaline with litmus and phenolphthalein at a pH of about 9.5. It dissolves many metal oxides when melted. The relative density is 1.73. Melting point 75 Â° C (quick heat). The refractive index is 1.447 to 1.472. Half lethal dose (rat, oral) 5.66g/kg Use: Biochemical research. Buffer. Metal flux. preservative. Save: RT
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