Expiration Date of 1% Alconox Detergent Solution

Question:
What is the expiration date of a 1% solution of Alconox detergent?

Answer:
A 1% Alconox solution has an expiration date of 3 weeks from preparation using deionized or distilled water stored in a closed container. The reason for the short shelf life is that the dilute detergent is a carbon source for microbes and the dilute detergent will eventually start to support microbial growth. It is acceptable to open the container periodically to pour out solution for use as long as the container is closed promptly after opening.