reconstituted solution is the fragile part. that is where the cold chain actually earns its keep
#storage-coldchain 2026-05-09
Saturday30 messages7 participantstimes are UTC
Highlights from this day
- coa_or_cope — the door swings four or five degrees every time somebody opens it. the back barely moves i freeze aliquots and have had them test fine afterwards. others here would… 20:54
- coa_or_cope — does the fridge in a hotel room count as a fridge a few hours at room temperature is almost certainly nothing. a week is a different conversation 20:57
- seven_five_sweet — lyophilised powder is genuinely robust. a warm transit is far less likely to matter than people fear, from memory 21:31
- seven_five_sweet — right so best travel setup for 18 days away with vials 21:45
powder is robust
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a few hours at room temperature is almost certainly nothing. a week is a different conversation
coming back after 5 months, is the pinned storage table still current
i would use it
the door swings four or five degrees every time somebody opens it. the back barely moves
i freeze aliquots and have had them test fine afterwards. others here would not do it and i understand why
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does the fridge in a hotel room count as a fridge
a few hours at room temperature is almost certainly nothing. a week is a different conversation
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do you log the fridge temperature or is that too far
not the door
freezing reconstituted peptide is the one thing this channel has never agreed on
solution is not
i freeze aliquots and have had them test fine afterwards. others here would not do it and i understand why, still working it out
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hotel minibars are frequently not cold enough. i take a thermometer, which is ridiculous and also correct
not the freezer
a cooler with two gel packs held under eight degrees for eleven hours on a drive
the vial that visibly changed after a warm transit was the one that had already been reconstituted
does the amber vial thing matter or is it marketing
buy a thermometer. mine reads 4 on the door and two degrees lower at the back
sorry to jump in a liquid cold pack tells you it was above freezing, not that your vial cooked
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lyophilised powder is genuinely robust. a warm transit is far less likely to matter than people fear, from memory
mon 4.1 / door 7.2
tue 4.0 / door 7.8
wed 4.2 / door 6.9
thu 3.9 / door 7.4
fri 4.1 / door 8.1 <- shopping day
sat 4.3 / door 7.0
sun 4.0 / door 6.8right so best travel setup for 18 days away with vials
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parcel sat in a hot mailbox for 3 hours, is it dead
for flying, hand luggage every time. the hold is not temperature controlled the way people assume
is there a difference in stability between the compounds
unopened and in-use in the same place is fine. just keep the in-use one where you can reach it
thats fine
two to eight degrees. most domestic fridge doors are not in that range and people do not check, i have it written down somewhere
does anyone freeze reconstituted vials or is that madness
the practical risk in winter shipping is freezing, and in summer it is heat. plan for the season you are in
freeze thaw cycling is the risk, not one freeze. that is my read of it anyway
*Janoshik not the other one