Supriya Ghosh (Editor)

Sodium arsenate

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Formula
  
Na3AsO4

Density
  
2.87 g/cm³

Classification
  
Arsenates

Molar mass
  
207.8885 g/mol

Melting point
  
280 °C

Appearance
  
colourless solid

Sodium arsenate https3imimgcomdata3ARUDMY2780014sodium

Sodium arsenate is the inorganic compound with the formula Na3AsO4. Related salts are also called sodium arsenate, including Na2HAsO4 (disodium hydrogen arsenate) and NaH2AsO4 (sodium dihydrogen arsenate). The trisodium salt is a white or colourless solid that is highly toxic. It is usually handled as the dodecahydrate Na3AsO4.12H2O.

The compound can be obtained by neutralizing arsenic acid:

H3AsO4 + 3 NaOH → Na3AsO4

The salt (as its dodecahydrate) is isomorphous with trisodium phosphate.

References

Sodium arsenate Wikipedia
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