It remains viable for 6 months to 1 year after opening the cap. Unlike food, most laundry detergents can be used past their expiry date. Expired laundry detergents become less effective and lose their clean scent.
How do you know if detergent is expired?
If a powdered detergent becomes hard or cakey, it should be discarded. The powder will probably not dissolve correctly or completely in the washer leaving soap deposits on your clothing.
How long is dishwasher detergent good for?
Dish washing soap is usually good for up to 12-18 months and automatic dishwashing detergent is only good for about three. Once it expires, all of the bacteria eliminating properties are diminished and there is no use for it anymore.