In a recent note Grubb and Osthoff'published a study of the separation of water-dioxane mixtures at 25'into two layers on the addition of hydrogen chloride. They stated that this behavior had not been reported previously. It was, however, given brief mention in a review article 14 years ago2 and has sincea been studied quantitatively. Figure la shows the tie- lines and the area corresponding to two-phase systems as determined by direct analysis ...
![4-[(2,2-dichloroacetyl)amino]benzoic acid结构式](https://image.chemsrc.com/caspic/060/7146-73-8.png)