How long can I use Pathex?

The concentrated product has a 2 year shelf-life with expiration date marked on the container. Diluted Pathex has a use-life of 60 days. If diluted Pathex is used as an ultrasonic solution for instrument cleaning, or holding solution to keep soiled items wet, discard solution at least daily or when solution appears soiled. Store away from excessive heat and cold. Do not allow to freeze.