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Trisodium arsenate

Sodium arsenate
Names
IUPAC name
Sodium dihydrogen arsenate
Other names
sodium arsenate
Identifiers
ChEBI
ECHA InfoCard 100.033.334
Properties
H24Na3AsO16 (dodecahydrate)
Molar mass 207.88851 g/mol
Appearance colourless solid
Density 1.517 g/cm3 (dodecahydrate)
soluble
Hazards
Main hazards toxic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
YesY  (what is YesYN ?)
Infobox references

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:

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



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