Sterility describes the aseptic condition, i.e. the absence of living organism. During the sterilisation process transferable organism such as fungus, bacteria or viruses are elliminated. TPP receives product sterility through a sterile production processes followed by irradiation sterilisation. TPP products are provided sterile only. Sterility is maintained as long as the packaging remains unopened and free from visible defect. Factors such as direct sunlight, moisture and large temperature amplitude changes can have negative effects to the sterility.TPP guaranties a “Sterility Assurance Level” (SAL) of 10-3. The sterility is validated conforming DIN EN ISO 11137.