... ≤10%E1+ E2+E3+E1-I+E1-7MOA≥77.0%Related substancesAny impurity≤4.0%Total impurity≤23.0%Potency(Moisture ... powder, stinkless, bitter an hygroscopic, freely soluble in water, slightly soluble in methanol and ethanol, insoluble in acetone, ether, ect. Its free base ... -promoting effect.Storage:To be stored away from light but in a cool and dry place. Colistin sulfate 1264-72-8 ...