THE PHYSICAL PROPERTIES OF LYSOLECITHIN AND ITS SOLS: Part I.—Solubilities, Surface and Interfacial Tensions

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Abstract
The solubilities of lysolecithin in water and some organic solvents have been determined and the effect of lysolecithin at air-water and chloroform-water interfaces examined. The results indicate that lysolecithin has marked surface-active properties and that a critical micelle concentration occurs in the aqueous sols in the range 1 to 2 times 10−3 per cent weight/volume. The effects of acid, alkali and mono- and di-valent cations on the lowering of the interfacial tensions was found to be small. Lysolecithin had little or no lowering effect on the surface tensions of ethanol and chloroform.