The validity of the test cassette depends on the use by period and the use by date.

•  Use by period: A period of 90 days in which the test cassette must be used up after the foil cover of the plastic container was opened. The use by period in days is printed on the box and in the package insert of the test cassette.
•  Use by date: Date up to which a test cassette stored in a closed plastic container is valid. The use by date is shown on the box of the test cassette/foil-sealed plastic container.