RT Journal Article SR Electronic T1 Polymorphic Changes of Mannitol During Freeze-Drying: Effect of Surface-Active Agents JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 96 OP 101 VO 51 IS 2 A1 Haikala, Ritva A1 Eerola, Riikka A1 Tanninen, Veli Pekka A1 Yliruusi, Jouko YR 1997 UL http://journal.pda.org/content/51/2/96.abstract AB The effect of polysorbate 80 on the crystalline properties of mannitol during freeze-drying was studied. Crystallinity and polymorphism play an important role in, e.g., the solubility and stability of freeze-dried products. Polysorbate 80 had an effect on both the polymorphism and the crystallinity of freeze-dried mannitol.