#storage-coldchain 2025-10-22

the vial that visibly changed after a warm transit was the one that had already been reconstituted

i would bin it

two to eight degrees. most domestic fridge doors are not in that range and people do not check, i think

freeze thaw cycling is the risk, not one freeze. that is my read of it anyway

best travel setup for 19 days away with vials

not the door

a cooler with two gel packs held under eight degrees for eleven hours on a drive

i left a reconstituted vial out overnight once, sent it for testing out of curiosity, it came back fine

a few hours at room temperature is almost certainly nothing. a week is a different conversation

unrelated but lyophilised at room temp for 5 days in transit, worried or not

how cold is too cold, can it actually freeze in a normal fridge

update on the earlier thing is a five pound fridge thermometer actually worth it
freeze thaw cycling is the risk, not one freeze. that is my read of it anyway

right so hotel minibars are frequently not cold enough. i take a thermometer, which is ridiculous and also correct

solution is not

two to eight

test it

hand luggage

sorry to jump in if you are worried after a bad transit, test it. that is what the testing channels are for

buy a thermometer. mine reads 3.1 on the door and two degrees lower at the back

gel packs

the door swings four or five degrees every time somebody opens it. the back barely moves

unopened and in-use in the same place is fine. just keep the in-use one where you can reach it
the vial that visibly changed after a warm transit was the one that had already been reconstituted

does anyone freeze reconstituted vials or is that madness

a liquid cold pack tells you it was above freezing, not that your vial cooked
the vial that visibly changed after a warm transit was the one that had already been reconstituted

coming back after 2 months, is the pinned storage table still current

nobody here can tell you a vial is safe. we can tell you what has and has not survived for us, i have it written down somewhere

does the fridge in a hotel room count as a fridge

not the freezer

the practical risk in winter shipping is freezing, and in summer it is heat. plan for the season you are in