Phenidone handling when the packaging sucks

Michael R 1974 said:

This is interesting. If Phenidone keeps well in solution as Ian says, why do formulas like POTA have a reputation for being extremely short lived?

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It's relative PQ solutions tend to keep much longer than MQ and there do appear to be big differences in keeping properties of Phenidone synthesised in the US compared to the UK.

I can only speak from experience. I regularly use Phenidone developers made up from raw chemistry up to 2 or 3 years before with no issues the only caveat is stored in full bottle for most of the time.

Ian

The hydrolysis of phenidone is pH dependent. The higher the pH of the solution the faster the rate of hydrolysis. So low pH developers will keep longerr than those with a higher pH.

If you have ever made up the POTA developer you will notice that the solution quickly becomes pink. In the early steps of the hydrolysis the reaction IS reversible.

Gerald C Koch said:

All I can say is that I have a plastic jar of black tar that once was phenidone. A glass jar of phenidone that is far older remains fine. The high humidity and temperatures in Florida may be the difference.

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Most certainly environmental conditions can have a huge effect on chemical storage. I live in the Pacific Northwest - much liwer humidity and temp conditions than Florida.

I was only trying to show it can last a long time.