Disodium hydrogen arsenate

Disodium hydrogen arsenate
Names
	Other names Sodium arsenate dibasic
Identifiers
ChEBI	CHEBI:91256 ;
ECHA InfoCard	100.029.002
PubChem CID	24899852;
CompTox Dashboard (EPA)	DTXSID8032047 ;
Properties
Chemical formula	H15Na2AsO11 (heptahydrate)
Molar mass	312.01 g/mol (heptahydrate)
Appearance	white solid
Solubility in water	good
Hazards
Main hazards	poison
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
	Infobox references

Disodium hydrogen arsenate is the inorganic compound with the formula Na₂HAsO₄^.7H₂O. The compound consists of a salt and seven molecules of water of crystallization although for simplicity the formula usually omits the water component. The other sodium arsenates are NaH₂AsO₄ and Na₃AsO₄, the latter being called sodium arsenate. Disodium hydrogen arsenate is highly toxic. The salt is the conjugate base of arsenic acid. It is a white, water-soluble solid.[1]

References

Grund, S. C.; Hanusch, K.; Wolf, H. U. "Arsenic and Arsenic Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_113.pub2.

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[Ullmann-1] Grund, S. C.; Hanusch, K.; Wolf, H. U. "Arsenic and Arsenic Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a03_113.pub2.