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  1. #1
    kb3lms's Avatar
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    Stannous Chloride

    Hi Chemists! Maybe you can help with this.

    Today on the discard pile at work I found a 4 oz., sealed bottle of Fisher branded Stannous Chloride dihydrate. Since I know that SnCl2 can be used for reduction sensitization and as a foggant for E-6 processing, I grabbed it. From the looks of the bottle I would say it is from the 60s or 70s, but it was sealed until I opened it.

    Now looking up online, it appears that to make a solution of SnCl2 it can be dissolved in 1M HCl. So I went ahead and made 100ml of a 1M HCl (ok, muriatic acid from Lowes) solution and tried dissolving 0.5 g SnCl2. Rather than dissolving a white precipitate seems to form: looks like a fine powder suspended in the liquid. And advice on getting the stuff to dissolve or is this normal? I have it heating a bit now but that doesn't appear to be helping.

    Maybe the stuff is too old and no good anymore. IDK why they would have had the stuff. We're having a clean out event at work and guess they didn't know either so they tossed it.

    -- Jason
    All this has happened before, and all this will happen again.

  2. #2

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    It sounds like the stannous chloride has undergone hydrolysis. A way to prevent this is to have a few small pieces of tin metal in the bottle.

    SnCl2 + H2O --> Sn(OH)Cl + HCl

    When you opened the bottle was there an odor of hydrogen chloride?
    Last edited by Gerald C Koch; 11-27-2012 at 08:22 PM. Click to view previous post history.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  3. #3
    kb3lms's Avatar
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    No, there really wasn't any odor at all.

    Well, if it's no good it isn't any great loss.
    All this has happened before, and all this will happen again.



 

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