Equilibrium solutions of certain lactose-salt mixtures

Summary 1.The solubility of latcose in solutions of twenty-four different salts has been determined. The comparative influence of the various salts places the ions in an order of arrangement conforming essentially to the series compiled by Cooper based upon free energy values, and to the Hoffmeister series. 2.The solubilizing effects noted are explained by postulating the formation of complexes or compounds which are more soluble than the lactose itself. 3.The lactose · CaCl 2 · 7H 2 O compound previously reported has been prepared by simple means, and methods for preparing two other compounds, lactose · CaBr 2 · 7H 2 O and lactose · Cal 2 · 3H 2 O, are described.