The osmotic pressure method has the advantage over
other methods as pressure measurement is around the room
temperature and the molarity of the solution is used instead of molality As compared to other colligative properties, its magnitude is large
even for very dilute solutions The technique of osmotic pressure for
determination  of molar mass of solutes is particularly useful for
biomolecules as they are generally not stable at higher temperatures
and polymers have poor solubility Two solutions having same osmotic pressure at a given
temperature are called isotonic solutions