the vial that visibly changed after a warm transit was the one that had already been reconstituted
#storage-coldchain 2026-03-28
Saturday33 messages7 participantstimes are UTC
Highlights from this day
- vialkeeper — does anyone freeze reconstituted vials or is that madness a few hours at room temperature is almost certainly nothing. a week is a different conversation 20:09
- subq_sy — lyophilised at room temp for 5 days in transit, worried or not 20:32
- patent_2026 — a cooler with two gel packs held under eight degrees for eleven hours on a drive 21:14
- patent_2026 — parcel sat in a hot mailbox for 6 hours, is it dead 21:21
i would use it
not the door
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a liquid cold pack tells you it was above freezing, not that your vial cooked
does anyone freeze reconstituted vials or is that madness
a few hours at room temperature is almost certainly nothing. a week is a different conversation
update from 7 months ago: replaced the fridge, temperature is stable, no more anxiety
while im here does the fridge in a hotel room count as a fridge
the practical risk in winter shipping is freezing, and in summer it is heat. plan for the season you are in
buy a thermometer
buy a thermometer. mine reads 6.2 on the door and two degrees lower at the back
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lyophilised at room temp for 5 days in transit, worried or not
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light exposure matters much less than temperature for these. i still keep them in the carton
i would bin it
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for flying, hand luggage every time. the hold is not temperature controlled the way people assume
reconstituted solution is the fragile part. that is where the cold chain actually earns its keep
the door swings four or five degrees every time somebody opens it. the back barely moves
freeze debate again
freeze thaw cycling is the risk, not one freeze. that is my read of it anyway
hotel minibars are frequently not cold enough. i take a thermometer, which is ridiculous and also correct
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freezing reconstituted peptide is the one thing this channel has never agreed on
a cooler with two gel packs held under eight degrees for eleven hours on a drive
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parcel sat in a hot mailbox for 6 hours, is it dead
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back of the fridge
my fridge is running at 4, is that out of range
i left a reconstituted vial out overnight once, sent it for testing out of curiosity, it came back fine
sorry to jump in i freeze aliquots and have had them test fine afterwards. others here would not do it and i understand why
is a five pound fridge thermometer actually worth it
lyophilised powder is genuinely robust. a warm transit is far less likely to matter than people fear
how long is reconstituted actually good for at room temperature
unopened and in-use in the same place is fine. just keep the in-use one where you can reach it
two to eight degrees. most domestic fridge doors are not in that range and people do not check
if you are worried after a bad transit, test it. that is what the testing channels are for
solution is not
right so i log the fridge temperature daily and the room has never let me forget it