excursion — 20 things I got wrong before I got it right
Something I keep coming back to: excursion — 20 things I got wrong before I got it right. A stability statement is only meaningful with its conditions attached: temperature, duration, light exposure, and whether it covers powder or solution. Ask which. Regional stock changes the question rather than answering it:…
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.
I would not freeze it in solution. That is a different failure mode and a worse one.
I would not freeze it in solution.
Agreed, and a logger costs less than the vial you are worrying about.
Asked QYB which lines they hold regionally and got a straight list back. That answered my summer ordering question completely.
Seasonality, which the source-page lane tables show clearly once you look for it.
The same origin, destination and carrier can differ by several days between February and August, and the temperature exposure differs by much more than the transit time suggests. A lane that is uneventful in winter is the same lane that generates the summer threads.
Two practical consequences. First, compare like months when you compare lanes. Second, ask which lines a supplier holds in regional stock — a shorter leg in July is worth more than any amount of packaging.