PH stockpile - still good?

For all of you that stocked up on M1T, 4AD etc, did you end up using it all by now? I still have alot of 4AD powder (125g). I've kept it in my closet since I received it. I want to do some homebrew transdermal. I'm wondering if it's still any good. It doesn't have an expiration date.

i still have a stock pile but i jumped right over to the dark side when the ban hit town. i'm considering throwing 1-4add into my next cycle for possible yet mild EQ-like benefits.

Your 4-ad should still be good if you've stored it properly.