[pure-silver] Re: Phenidone in solution
- From: "John Black" <jblack@xxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 20 Jan 2005 12:12:31 -0500
> Quite a few months ago I made up a 5% solution of phenidone in Isopropyl
> alcohol, used what I needed and stored the rest in air tight but not full
> container. Today I looked at it and it has turned a golden color. I
cannot stir
> the color out so I'm wondering if it is safe to say it is shot and simply
toss
> it out or can it still be used effectively?
NO!! It is most likely dead or mostly dead. Phenidone in alcohol,
especially alcohol with some water as is most isopropyl, becomes inactive
within a matter of days. You can keep phenidone by dissolving ascorbic acid
first in dry methanol, ethylene glycol or propylene glycol and then the
phenidone. The vitamin C protects the phenidone.
Throw out what you have.
BTW, the color does not seem to be predictive of decay. I have methanol
solutions of phenidone and ascorbic acid that are 5-6 months old and quite
"golden" but still active.
JB
=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your
account (the same e-mail address and password you set-up when you subscribed,)
and unsubscribe from there.
Other related posts:
