[Factors determining the stability of oleandomycin phosphate]

Comparative stability of crystalline and amorphous oleandomycin phosphate was studied. It was shown that the structure and humidity of oleandomycin phosphate were among the main factors determining its stability. Crystalline oleandomycin phosphate was highly stable and the effect of humidity on its stability was relatively low. A significant effect of humidity on the stability of amorphous oleandomycin phosphate was observed.