if you are worried after a bad transit, test it. that is what the testing channels are for
#storage-coldchain 2026-06-06
Saturday40 messages10 participantstimes are UTC
Highlights from this day
- pinch_not_stretch — the door swings four or five degrees every time somebody opens it. the back barely moves 20:00
- bpc_sceptic — the practical risk in winter shipping is freezing, and in summer it is heat. plan for the season you are in buy a thermometer. mine reads 4.8 on the door and two… 20:38
- plus_sixteen — flying with vials, hand luggage or checked 21:47
- plus_sixteen — door shelf or back of the fridge 22:07
coming back to this i have never had a lyophilised vial fail after a warm transit and i have had some bad ones
the door swings four or five degrees every time somebody opens it. the back barely moves
📉8👍2
is a five pound fridge thermometer actually worth it
the vial that visibly changed after a warm transit was the one that had already been reconstituted
freeze thaw cycling is the risk, not one freeze. that is my read of it anyway
thats fine
a liquid cold pack tells you it was above freezing, not that your vial cooked
*PeptideMeter not the other one
hand luggage
pinch_not_stretchthe door swings four or five degrees every time somebody opens it. the back barely moves
buy a thermometer. mine reads 3.1 on the door and two degrees lower at the back
how do you keep it cold on a long drive in summer
two to eight degrees. most domestic fridge doors are not in that range and people do not check
the practical risk in winter shipping is freezing, and in summer it is heat. plan for the season you are in
buy a thermometer. mine reads 4.8 on the door and two degrees lower at the back
lyophilised at room temp for 9 days in transit, worried or not
anyone tested a vial before and after a bad transit
freeze debate again
unopened and in-use in the same place is fine. just keep the in-use one where you can reach it
test it
anyone had a vial visibly change after a warm transit
log it
a few hours at room temperature is almost certainly nothing. a week is a different conversation
power cut with the door shut for a few hours is fine. a full fridge holds temperature surprisingly well
my fridge is 5.6
gel packs
for flying, hand luggage every time. the hold is not temperature controlled the way people assume
nobody here can tell you a vial is safe. we can tell you what has and has not survived for us
i left a reconstituted vial out overnight once, sent it for testing out of curiosity, it came back fine
freezing reconstituted peptide is the one thing this channel has never agreed on
[redacted at member request] · archive policy
flying with vials, hand luggage or checked
✅5⚠️1
powder is robust
📈18❤️1
door shelf or back of the fridge
🧪11
back of the fridge
a cooler with two gel packs held under eight degrees for eleven hours on a drive, ymmv
update from 3 months ago: replaced the fridge, temperature is stable, no more anxiety
*PeptideMeter not the other one
for the archive light exposure matters much less than temperature for these. i still keep them in the carton
buy a thermometer