genuine question about data logger that I am slightly embarrassed to ask
genuine question about data logger that I am slightly embarrassed to ask — that is what I am asking, and I have already read the wiki twice. 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…
Lyophilisation removes the water that drives most degradation pathways. That is why the dry cake is comparatively robust and the reconstituted solution is not.
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This. A liquid gel pack on arrival tells you about the pack’s duty cycle, not about the vial.
This.
Agreed, and a logger costs less than the vial you are worrying about.
Correction: that stability figure covers the lyophilised powder, not the reconstituted solution. Different claim entirely.
That is the ambient temperature at the destination, not the temperature inside the box. The logger measures the second one.
powder at room temperature for a few days is usually a non-event
fridge, not freezer, once it is in solution
fridge, not freezer, once it is in solution
This is the distinction that resolves most threads here — powder and solution are different problems.
Gel packs are designed for a duty cycle. A liquid pack at the end of a longer-than-expected transit is a pack behaving as specified, not evidence of an excursion in the vial.
if you want to know, log it, otherwise you are guessing