Added is sodium benzoate, which is available for metal rust prevention.
Glutaraldehyde solution is a highly effective disinfectant. Although it has the advantages of high efficiency, fast-acting, broad-spectrum, etc., but soaking metal instruments, easy to cause rust. 2% glutaraldehyde solution plus 0.5% sodium nitrite soaking metal instruments neither rust, nor reduce the effectiveness of sterilization.
Diagnostic instruments, instruments and articles should be thoroughly cleaned and dried before sterilization. Newly opened diagnostic and therapeutic instruments, appliances and articles to remove oil and protective film, and then cleaned with detergent to remove grease, dry in time to disinfect or sterilize.
Expanded information:
Used for the sterilization of the environment and articles in the diagnostic and therapeutic instruments, cosmetic industry, electronic industry, hotel industry, hygiene products and other industries. For heat-resistant and moisture-resistant items can be preferred to pressure steam and dry heat sterilization, heat- and moisture-resistant items can be selected ethylene oxide gas sterilization. If you can only choose glutaraldehyde sterilization, sterilized medical devices must be rinsed with sterile distilled water (physiological saline may be corrosive).
Any medical product must be thoroughly cleaned before disinfection and sterilization; after cleaning, it must be dried before being immersed in glutaraldehyde solution to avoid dilution of glutaraldehyde.
Baidu Encyclopedia - Glutaraldehyde Sterilization Solution