ISO 25424:2009 specifies requirements for the development, validation and routine control of a Low Temperature Steam and Formaldehyde (LTSF) sterilization process for medical devices.

ISO 25424:2009 is intended to be applied by process developers, manufacturers of sterilization equipment, manufacturers of medical devices to be sterilized and the organizations with responsibility for sterilizing medical devices.

ISO 25424:2009 covers sterilization processes that use a mixture of low temperature steam and formaldehyde as sterilant, and which are working below ambient pressure only.