Re: chrysotype and 21 steps

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From: Wisbl (isabella32@earthlink.net)
Date: 11/15/00-10:31:46 AM Z

Or, you can just buy it from Englehard, who supplies First Reaction.

WIlliam Linne

garimo wrote:
>
> I received 100g. of 3,3' thiopropionic acid for $45.10 from:
> First Reaction
> 37 Depot Rd.
> Hampton Falls, NH 03844
> PH: 603-929-3583
> Fax: 603-929-5023
>
> Also a good(?) source for metals. in Sept. Ammonium
> tetrachlorplatinate was $28.60 g. Chloroauric acid was $17.25 g.
>
> >The correct term is: 3,3' thiopropionic acid (or beta, beta'-propionic
> >acid) or 3-mercaptopropionic acid. (Interestingly, the 2-mercapto compound
> >is the substance in onions that causes tears.) If you find a retail source
> >for this substance, let me know, as it is used industrially in resins and I
> >don't know of any other common usage.
> >
> >
> >Sil Horwitz, FPSA
> >Technical Editor, PSA Journal
> >teched@psa-photo.org
> >silh@earthlink.net
> >Visit http://www.psa-photo.org/
> >Personal page: http://home.earthlink.net/~silh/

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