1968 who knew LOL!
Injection solutions in peach oil are widely used in medicinal practice. However, as experiment has shown, some materials, especially of the steroid class, are either extremely sparingly soluble in the oil or gradually crystallize out from the solution during storage, forming fairly coarse crystals which cannot be redissolved even on heating.
On the basis of literature information [1, 2], to obtain stable solutions of hormone preparations in oil we have used benzyl benzoate (C6H~CO 2 9 CH2C6Hs) as a cosolvent. This is a clear colorless liquid, odorless or with a faint balsam-like smell, which does not dissolve in water or glycerol but mixes with alcohol, chloroform, ether, and fatty oils.