Solid State and Solution Properties of Octyl D‐Glucopyranosides

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Abstract
The physical properties of the surfactants octyl α‐ and β‐D‐glucopyranoside show some remarkable differences. At 25°C, the β‐anomer is much more soluble in water or diethyl ether than the α‐anomer, but only a slight difference in solubility is observed in 1‐octanol. The α‐anomer, which shows a Krafft‐point at ∼40°C, forms (above this temperature) micelles at half the concentration required for the β‐anomer. Comparison of the transition to the liquid crystal by DSC indicates that the β‐anomer will have a crystal packing which is much less ideal than the crystal packings observed for the α‐anomer.