back of the fridge
#storage-coldchain 2026-04-30
Thursday43 messages8 participantstimes are UTC
Highlights from this day
- septum_sal — coming back to this a liquid cold pack tells you it was above freezing, not that your vial cooked 17:43
- septum_sal — the door swings four or five degrees every time somebody opens it. the back barely moves 18:03
- plus_sixteen — two to eight degrees. most domestic fridge doors are not in that range and people do not check 19:25
- coa_or_cope — how cold is too cold, can it actually freeze in a normal fridge 19:41
hotel minibars are frequently not cold enough. i take a thermometer, which is ridiculous and also correct, we shall see
nobody here can tell you a vial is safe. we can tell you what has and has not survived for us
coming back to this a liquid cold pack tells you it was above freezing, not that your vial cooked
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ok so unopened and in-use in the same place is fine. just keep the in-use one where you can reach it
freezing reconstituted peptide is the one thing this channel has never agreed on
genuine question power cut with the door shut for a few hours is fine. a full fridge holds temperature surprisingly well
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i left a reconstituted vial out overnight once, sent it for testing out of curiosity, it came back fine
i left it out overnight by accident, bin it or use it
the door swings four or five degrees every time somebody opens it. the back barely moves
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rotate_the_sitenobody here can tell you a vial is safe. we can tell you what has and has not survived…
coming back after 11 months, is the pinned storage table still current
a few hours at room temperature is almost certainly nothing. a week is a different conversation, your mileage will differ
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i have never had a lyophilised vial fail after a warm transit and i have had some bad ones, from memory
update on the earlier thing freeze thaw cycling is the risk, not one freeze. that is my read of it anyway
if you are worried after a bad transit, test it. that is what the testing channels are for, i have it written down somewhere
solution is not
the vial that visibly changed after a warm transit was the one that had already been reconstituted, from memory
i freeze aliquots and have had them test fine afterwards. others here would not do it and i understand why
buy a thermometer
lyophilised powder is genuinely robust. a warm transit is far less likely to matter than people fear
i keep everything at the back of the middle shelf, never the door, ill dig out the number
i would bin it
test it
two to eight degrees. most domestic fridge doors are not in that range and people do not check
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 6.8rotate_the_sitei freeze aliquots and have had them test fine afterwards. others here would not do it…
cold pack arrived completely liquid, does that mean anything
unrelated but i log the fridge temperature daily and the room has never let me forget it
what temperature does a domestic fridge door actually swing to
how cold is too cold, can it actually freeze in a normal fridge
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does the fridge in a hotel room count as a fridge
powder is robust
not the door
my fridge is 3.1
gel packs
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i would use it
a cooler with two gel packs held under eight degrees for eleven hours on a drive
anyone had a vial visibly change after a warm transit
is there a difference in stability between the compounds
thats fine
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do you log the fridge temperature or is that too far
for flying, hand luggage every time. the hold is not temperature controlled the way people assume
Archive lookup: willow_waits first appears in this channel on 2026-02-14.
update on the earlier thing the practical risk in winter shipping is freezing, and in summer it is heat. plan for the season you are in
anyone tested a vial before and after a bad transit
a few hours at room temperature is almost certainly nothing. a week is a different conversation