Power cut for eleven hours: how I assessed it afterwards posts 91–110

Coming back to post #89, because the follow-up matters more than the original answer.

Power cut for eleven hours has a well-known answer and a correct answer, and the interesting work is establishing that they are the same. Nobody has done that here yet.

Temperature excursions: if a vial sat at room temperature for a time, the question is whether the excursion was long enough to cause damage. Hours at room temperature is usually low risk. Days to weeks raises the risk. If you are unsure, contacting the supplier is more informative than guessing.

Adding what did not work for me on power cut for eleven hours, since the failures never get written up and they are half the useful information.

This follows post #93 rather than contradicting it.

My understanding of power cut for eleven hours is a few years old and may have been superseded. If it has been, I would genuinely like to know rather than keep repeating it.

Clarity is a weak test. A solution can lose a significant fraction of its active content to degradation or adsorption while remaining perfectly clear.

The bit of power cut for eleven hours that nobody enjoys is that the answer changes depending on what you are trying to decide with it. Say what the decision is and the thread will converge.

On post #93 — agreed on the reasoning, with one qualification.

An observation about power cut for eleven hours that I cannot explain and am posting anyway, on the principle that unexplained observations are more useful public than private.

Picking up post #97: that is the part I would want checked first.

Visible particulate is a strong signal in the other direction: it is a reason to stop and ask rather than to filter and proceed.

Where the power cut for eleven hours discussion usually stalls is that nobody wants to say "I do not know" and everyone is willing to say "it varies". Those are the same sentence with different clothes on.

Post #97 is the version of this I will quote in future. One addition.

The arithmetic on power cut for eleven hours is the easy part and it is where the errors are, which is an uncomfortable combination. Show your working and someone will catch it.

Post #97 describes the usual case. This is about the unusual one.

Clarity is a weak test. A solution can lose a significant fraction of its active content to degradation or adsorption while remaining perfectly clear.

One of those cases where knowing the mechanism does not help the decision.

Sensible. I would want the same detail before I acted on it either.

Visible particulate is a strong signal in the other direction: it is a reason to stop and ask rather than to filter and proceed.

I have deliberately not rounded that, because the rounding is where the argument starts.

Distinguishing three things in the power cut for eleven hours discussion that keep getting used interchangeably: the observation, the proposed mechanism, and the recommendation that gets attached to both.