why does everything need the fridge after mixing but not before

first_vialSenior Analyst

dont fully understand this. the powder seems fine at room temp for ages but the second theres liquid in there everyone says fridge immediately. whats the actual difference

4 replies5 upvotesBeginner Questions

4 replies

  • cold_chainSenior Analyst

    Water is the difference, doing two things. Most degradation needs water (hydrolysis is exactly what it sounds like), and a solution can grow bacteria where a powder can't. Reconstituting starts two clocks. The fridge slows both.

    7 upvotes

    • first_vialSenior Analyst

      two clocks is a really clear way to think about it, thanks

      4 upvotes

  • lyophilised_or_notSenior Analyst

    Powder isn't indefinitely stable either, just much slower. You've got longer to get it wrong.

    4 upvotes

  • newvialwhodisSenior Analyst

    two clocks. ok

    2 upvotes

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