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.

[2] The compound can be obtained by neutralizing arsenic acid: The salt (as its dodecahydrate) is isomorphous with trisodium phosphate.

This inorganic compound–related article is a stub.