the vial that visibly changed after a warm transit was the one that had already been reconstituted
#storage-coldchain 2025-09-08
Monday35 messages8 participantstimes are UTC
Highlights from this day
- melb_meniscus — freezing reconstituted peptide is the one thing this channel has never agreed on 15:27
- ferrous_ash — what temperature does a domestic fridge door actually swing to 16:02
- weather_watch — the practical risk in winter shipping is freezing, and in summer it is heat. plan for the season you are in 18:30
- ferrous_ash — power cut with the door shut for a few hours is fine. a full fridge holds temperature surprisingly well 18:33
- net_peptide — coming back after 25 months, is the pinned storage table still current 18:46
freezing reconstituted peptide is the one thing this channel has never agreed on
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log it
reconstituted solution is the fragile part. that is where the cold chain actually earns its keep
buy a thermometer
back of the fridge
i left it out overnight by accident, bin it or use it
what temperature does a domestic fridge door actually swing to
weights-monthly.csv
91 rows · not retained in the public archive
quick one my fridge is running at 7.4, is that out of range
i have never had a lyophilised vial fail after a warm transit and i have had some bad ones
while im here how cold is too cold, can it actually freeze in a normal fridge
two to eight degrees. most domestic fridge doors are not in that range and people do not check
[edited]does the amber vial thing matter or is it marketing
power cut for 5 hours, fridge stayed shut, am i fine
if you are worried after a bad transit, test it. that is what the testing channels are for
do i need to worry about light exposure or is that overthinking
right so freeze thaw cycling is the risk, not one freeze. that is my read of it anyway
unrelated but how do you keep it cold on a long drive in summer
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test it
does the fridge in a hotel room count as a fridge
not the door
powder is robust
unopened and in-use in the same place is fine. just keep the in-use one where you can reach it
not the freezer
| Condition | Lyophilised | Reconstituted |
|---|---|---|
| 2-8 °C | fine, long term | fine, weeks |
| Room temp, days | fine in every report here | reported fine, shorter |
| Room temp, weeks | reported fine | do not |
| Warm transit, 30 °C+ | no failure logged | one visible degradant peak |
| Frozen once | fine | contested, no consensus |
| Freeze-thaw cycled | fine | the room says no |
freeze debate again
lyophilised at room temp for 25 days in transit, worried or not
the practical risk in winter shipping is freezing, and in summer it is heat. plan for the season you are in
is a five pound fridge thermometer actually worth it
the door swings four or five degrees every time somebody opens it. the back barely moves
power cut with the door shut for a few hours is fine. a full fridge holds temperature surprisingly well
do you log the fridge temperature or is that too far
coming back after 25 months, is the pinned storage table still current
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thats fine
i would use it
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a few hours at room temperature is almost certainly nothing. a week is a different conversation