The osmotic pressure method is widely used to determine molar masses of proteins, polymers, and other macromolecules. It has distinct advantages over other colligative properties for these substances:

1. Magnitude: Its magnitude is large and easily measurable even for very dilute solutions, whereas changes in freezing point or boiling point are often too small to measure accurately for high molar mass solutes .
2. Temperature: The measurement is done around room temperature. This is essential for biomolecules like proteins, which are generally not stable at higher temperatures (required for elevation in boiling point) .
3. Solubility: Polymers often have poor solubility, necessitating the use of dilute solutions where osmotic pressure is most effective .