Does Metabisulfite Expire?

Discussion in 'Wine Making from Grapes' started by Donz, Oct 9, 2019.

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  1. Oct 9, 2019 #1

    Donz

    Donz

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    I have 2 year old sulfite... Just wondering your thoughts...?
     
  2. Oct 9, 2019 #2

    NorCal

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    I toss mine after a year. I have never measured the difference in efficacy, but I know when I open a new bag I get a much stronger odor than when it's a year old. It's inexpensive too.
     
  3. Oct 9, 2019 #3

    NorCal

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    I toss mine after a year. I have never measured the difference in efficacy, but I know when I open a new bag I get a much stronger odor than when it's a year old. It's inexpensive too.
     
  4. Oct 9, 2019 #4

    stickman

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    It definitely decomposes and loses strength over time, just use the old stuff for sanitizing solution.
     
  5. Oct 9, 2019 #5

    motherofgallons

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    I remember reading that Jack Keller throws his out after 6 months. When you think of the important job it has to do and the expense of the wine compared to the Campden it makes sense to be on the safe side.
     

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