Expiration date on powder form

[Aqua Splendor]

Is the Expiration date only there because it's sold for human and there's law or, is there elements that "perish" over time?

 

[Randy Holmes-Farley Verified Community Expert]

Potassium chloride will never go bad.

 

[Aqua Splendor]

So it's because of hom.o sapiens and their laws.