Strontium Metarsenite, Sr(AsO₂)₂.4H₂O

Strontium Metarsenite, Sr(AsO₂)₂.4H₂O, has been prepared by the action of ammonium arsenite on a solution of a strontium salt. The precipitate is increased by the addition of alcohol, since it is fairly soluble in water. When dried at 100° C. it has the composition Sr(AsO₂)₂.3H₂O. At higher temperatures it is decomposed. Staven-hagen failed to obtain this compound.