Sterile Isopropyl myristate (IPM) Crimp cap with septum
Isopropyl Myristate (IPM) is a fatty acid ester, which is used as solvent in water-in-oil emulsion, oils and fatty based ointments. Membrane filtration is the Pharmacopoeia method of choice for sterility testing. Viscous products, such as creams and ointments, can be difficult to filter and hence, are normally diluted in a sterile solvent, such as IPM to improve the filterability of these samples.
