Dry Yeast Question

Discussion in 'General Brewing Discussions' started by TheZel66, May 8, 2018.

  1. TheZel66

    TheZel66 Member

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    Dry Yeast Brewers,

    I have two packets of dry yeast that have an expiration date of 9/2018. I know dry yeast has a pretty long shelf life, but is that getting too close to the expiration date to use?
     
  2. Hawkbox

    Hawkbox Well-Known Member

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    I have some packs in the fridge dated 06/2017 and I'll probably do a starter off one to very it but otherwise I'm not worried about it. That stuff lasts forever.
     
  3. jeffpn

    jeffpn Well-Known Member

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    I wouldn’t worry even if it was a bit past the expiration date. You’re 4 months before it. I’m sure they know what they’re doing with expiration dates. RDWHAHB.
     
  4. Ozarks Mountain Brew

    Staff Member

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    Ive pitched dry yeast 3 years after I bought it and worked fine, as long as its kept dry it will keep forever
     
  5. J A

    J A Well-Known Member

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    If it suffered particularly harsh storage conditions it might be an issue, but any reasonable temps and humidity would leave it in fine shape even after the expiration date.
     
  6. Nosybear

    Nosybear Well-Known Member

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    I think you're good. I don't know what the expiration date means exactly for yeast. Do the packets have the manufacture date? If so, plug it into the yeast calculator and it'll give you a viability estimate.
     
  7. The Brew Mentor

    The Brew Mentor Well-Known Member

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    If you do use it, make sure you have a backup plan.
    Cheers,
    Brian
     
  8. Vallka

    Vallka Well-Known Member

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    Just pitched a expired Nottingham Ale that was 10 months past due date, pitched it on Sat and issues, it is the third package I have used in the past 6 or so months. I pitched it right in but a rehydration might be smarter way to go.
     
  9. BOB357

    BOB357 Well-Known Member

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    As many have stated, you're likely OK as long as it has not been subjected to poor handling or storage. For sure, rehydrate it, and if you're concerned about cell count, a 2 liter starter at 1.036 will approximately double the cell count and greatly improve overall vitality.
     
  10. soccerdad

    soccerdad Active Member

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    I have done 2 things with questionable dry yeast.
    1) rehydrate it to see if it gets creamy and foamy. You can pretty much tell if it's good to go ... or not
    2) make a small starter (1/2 cup DME to 2 cup water) with 1/2 of the yeast in the packet. Again, see if you get creamy, foamy (you can pretty much tell). If good, pitch the starter plus the balance of the dry.
     

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