This is a solution recommended for the sterilization and High Level disinfection of heat-sensitive, immersible medical and dental equipment and instruments. This glutaraldehyde is not recommended for use on scopes or any instrument with a lens because of the risk of film development. Contains Sodium Nitrite as a corrosion inhibitor. Sterilizing and Disinfecting Solution. A 28-Day Glutaraldehyde, Long Life, Activated Dialdehyde Solution. Activated Contents: One Gallon (128 fl. oz./3.8 liters). Long life, activated 28-day, 2.5% buffered glutaraldehyde solution, which contains surfactants. McKesson 28-Day Glutaraldehyde.