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Sodium metaborate

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Title: Sodium metaborate  
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Subject: Sodium nitride, Sodium zincate, Sodium permanganate, Sodium bismuthate, Sodium hypophosphite
Collection: Borates, Sodium Compounds
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Sodium metaborate

Sodium metaborate
Identifiers
CAS number  YesY
PubChem
EC number
RTECS number ED4640000
Jmol-3D images Image 1
Properties
Molecular formula NaBO2
Molar mass 65.80 g/mol
Appearance colorless crystals
Odor odorless
Density 2.46 g/cm3
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
Structure
Crystal structure trigonal
Thermochemistry
Specific
heat capacity
C
65.94 J/mol K
Std molar
entropy
So298
73.39 J/mol K
Std enthalpy of
formation
ΔfHo298
-1059 kJ/mol
Hazards
LD50 2330 mg/kg (rat, oral)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)

Sodium metaborate (NaBO2) is a colorless solid chemical compound. [1]

Contents

  • Preparation 1
  • Uses 2
  • See also 3
  • References 4

Preparation

Sodium metaborate is prepared by the fusion of sodium carbonate and borax. Another way to create the compound is by the fusion of sodium tetraborate with sodium hydroxide at 700° C.

Uses

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

See also

References

  1. ^ Sodium metaborate at Chemister
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