Quick Question - pH Chemicals and Age

No, not my age. I'm old enough!! I do, however, have some bottles of pH Up and Down and 4.0/7.0 solution from about 5 years ago. Does ANYONE have any sense as to whether these types of chemicals get old and degrade and become unviable/unstable, etc? I'd hate to throw 'em away but I don't want to use 'em if they aren't going to be effective or accurate. Thanks!!

Buy new chemicals, unless you really really wanna save the $20 it would take to replace w new. Course it would really suck to have those chemicals be bad and kill yer plants. Get new and be sure.

Yeah...scuffs dirt...you are probably right. Shucks. I actually have new stuff, I was just figuring I could go through the old stuff first.

Thanks!!!