phenidone concentrate

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Joe - 25 Jan 2006 21:29 GMT

How concentrated can I make a phenidone /alcohol solution? I hate the
smell of the alcohol (but I love the way phenidone dissolves in it) so
i would like to have as little as possible in my developers. Measuring
smaller amounts of a more concentrated solution is not a problem. Thanks

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ujazz32@hotmail.com - 25 Jan 2006 23:19 GMT

You can make a 10% solution of phenidone in propylene glycol that has
no smell and will last forever on the shelf.

Jay

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Lew - 26 Jan 2006 05:39 GMT

Will propylene glycol affect the pH of a solution it's added to? I think the
alcohol won't.
-Lew

> You can make a 10% solution of phenidone in propylene glycol that has
> no smell and will last forever on the shelf.
>
> Jay

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Joe - 26 Jan 2006 06:07 GMT

> You can make a 10% solution of phenidone in propylene glycol that has
> no smell and will last forever on the shelf.
>
> Jay

But I probbaly need to buy a gallon of PG for $10 or more, right?

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LR Kalajainen - 26 Jan 2006 12:55 GMT

I use 90% alcohol as my Phenidone stock mixed in 100 ml (1% solution)
sizes, which is enough to do about 50 liters of developer. While others
tout the greater keeping properties of glycol, I have found that my 100
ml bottle of stock will keep its potency for about six months. I can
live with having to mix stock twice a year (how long does it take to
throw a 1/2 teaspoon of Phenidone into a beaker of 100 ml. alcohol?) in
order to realize the huge savings in cost and the convenience of being
able to get my alcohol at the grocery store.

Larry

>You can make a 10% solution of phenidone in propylene glycol that has
>no smell and will last forever on the shelf.
>
>Jay
>
>

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dan.c.quinn@att.net - 26 Jan 2006 00:25 GMT

RE:Joe:

I gave Patrick Dignan's suggested method a try. In 1 liter
of water dissolve 1 gram of phenidone plus 5 grams of sodium
bisulfite. I made one change, I put it all in 250 ml., 8 ounces.

I use a splits method for portioning out stock or concentrates.
At start that one 250 ml went into two 125 ml bottles. The first
split after compounding would be a 125 into 2, 62.5 ml bottles.
A second split into 2, 1 ounce bottles brings the amount
to 1/8 gram phenidone. All contents are still at stock
or concentrate strength and full to the brim. Dan

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Joe - 27 Jan 2006 02:38 GMT

> How concentrated can I make a phenidone /alcohol solution? I hate the
> smell of the alcohol (but I love the way phenidone dissolves in it) so
> i would like to have as little as possible in my developers. Measuring
> smaller amounts of a more concentrated solution is not a problem. Thanks

well, I got .5 gram into 25 ml so far. Should I keep going?

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