[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.

[Solubility of the sodium salt of novobiocin in ethyl alcohol mixtures with other solvents].

Solubility of sodium novobiocin in binary mixtures of ethyl alcohol with ehtyl acetate, methylene chloride, diethyl ether, carbon tetrachloride or n-heptane was studied. Deviation in the sodium novobiocin solubility from the additivity was observed depending on the nature of the second component of the solvent mixture.