light exposure matters more for some compounds than others and nobody tabulates it
Posting this as a discussion rather than a claim: light exposure matters more for some compounds than others and nobody tabulates it. 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. Gel packs…
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.
That is the ambient temperature at the destination, not the temperature inside the box. The logger measures the second one.
That is the ambient temperature at the destination, not the temperature inside the box.
This is the distinction that resolves most threads here — powder and solution are different problems.
Cosigning the regional stock point. Ordering from a warehouse in the UK took the whole question off my table.
Powder or already in solution?
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.
That is the ambient temperature at the destination, not the temperature inside the box.
Disagreeing with this line only: freezing a reconstituted vial is not a safe default.