Sodium metaborate tetrahydrate (NaBO2•4H2O)-Crystaline introduce:
Sodium metaborate is a colorless solid chemical compound of sodium, boron, and oxygen with formula NaBO2. The formula can be written also as Na2O·B2O3 to highlight the relation to the main oxides of sodium and boron.
Molar mass: 137.86 g/mol
Appearance: white crystals
Density: 2.464 g/mL (anhydrous)
Melting point: 966 °C (1,771 °F; 1,239 K)
Boiling point: 1,434 °C (2,613 °F; 1,707 K)
Solubility in water:16.4 g/100 mL (0 °C);28.2 g/100 mL (25 °C);125.2 g/100 mL (100 °C)
Solubility: insoluble in ether, ethanol
Sodium metaborate is used in the manufacturing of borosilicate glasses. It is also a component of herbicides and antifreeze products.
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