[Question] how do you actually verify ice pack
how do you actually verify ice pack. Searched first, found three threads that contradict each other, hence the post.
Put a logger in three consecutive orders. Two never went above the range at all and the third spent four hours warm on a Friday. Cost me almost nothing to stop wondering.
A transit temperature logger records a distribution, and time above a threshold matters as much as peak temperature. That is the argument for logging rather than guessing.
Regional stock changes the question rather than answering it: shorter lanes mean less exposure and fewer variables, which is why the warehouse question is worth asking before ordering in summer.
If two or three other people have done the same thing we might actually learn something. Alone it is an anecdote.
best — the order this archive was captured in
A stability statement is only meaningful with its conditions attached: temperature, duration, light exposure, and whether it covers powder or solution. Ask which.
Once in solution, the relevant risks are hydrolysis, aggregation and, for some sequences, oxidation. Refrigeration slows all three; freezing a solution introduces a separate risk at the ice interface.
Push back: you cannot infer degradation from a temperature excursion alone. That is what testing is for.
Push back: you cannot infer degradation from a temperature excursion alone.
Disagreeing with this line only: freezing a reconstituted vial is not a safe default.
the door shelf is the worst place in the fridge
Is this a line they hold in regional stock or is it shipping from origin?
Gel pack fully liquid on arrival, powder tested 97.5% against a claimed 97.0% afterwards. The pack had done its job for as long as it was designed to.
Merged into the seasonal thread for that lane so the reports sit together.
That is the ambient temperature at the destination, not the temperature inside the box. The logger measures the second one.
Right, and asking what the stability statement was written against is one line of email that reframes everything.