Is my Star San still effective?

[MaltySMoOTH]

I have a bottle of Star San concentrate that's been sitting in a kitchen cabinet with a broken cap for about two years. Needless to say, I haven't brewed anything in a while. Being that my Star San has been exposed to oxygen for a long time, will it still be effective now? I want to brew this weekend and I am hesitant to use the Star San I have. Please share any Information regarding this, thanks.

 

[slym2none]

StarSan is an acidic sanitizer. As long as the pH is still good (no idea what that is, BTW) then it is still effective.

I am betting it is still good.

 

[robcj]

StarSan is an acidic sanitizer. As long as the pH is still good (no idea what that is, BTW) then it is still effective.

I am betting it is still good.

The pH needs to be 3 or lower for it to be effective.