I have 2 boxes of whole foods 365 chicken stock in my fridge. They are between 3 and 7 weeks old. are they ok to use if I cook them into a split pea soup for an hour or so?
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They've been opened right? I wouldn't use them after 2 weeks.
You didn't say if they were open. I'm guessing they are. DON'T use them. I wouldn't keep open boxed chicken stock more than 4 days, if THAT, without boiling it. You can always freeze the extras in ice cube trays or small containers. If they're not open, you should be fine.
I'm revising my answer. I wouldn't use an opened box past 1 week, and I agree with SueonFood that you should boil it after 4 days.
I generally keep for about two weeks, but won't use unless I boil it.
I am guessing they are opened (otherwise why are they in refrigerator) - dump 'em after that long for sure.
I would suggest that in the future when you open a new box of broth you write on the top what day you opened it and what day it needs to be used by. There's usually a note on the packaging about how long the broth lasts refrigerated after opening, which is generally 7-14 days.