Sodium metaborate tetrahydrate (NaBO2•4H2O)-Crystaline

Characteristic

 

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.




Chemical formula:NaBO2•4H2O

Molar mass: 137.86 g/mol

Appearance: white crystals

Odor: odorless

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

Crystal structure:trigonal

 


Application

 

Sodium metaborate is used in the manufacturing of borosilicate glasses. It is also a component of herbicides and antifreeze products.