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Thread: BZT mixing

  1. #1

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    BZT mixing

    I've been trying to mix a simple 2% solution of benzotriazole and keep getting a needle/crystalline precipitate when mixed with 125 degree water. Better to use cold water or could the chemical be off somehow? Hate to keep wasting it. Thanks for any help.

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    Benzo

    You need to first mix it up with about 200ml of iso-propyl alcohol. Than bring it to the needed quantity. It will stay suspended in this solution indefinately.
    Peter Schrager

  3. #3
    David A. Goldfarb's Avatar
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    It doesn't dissolve easily in water. Mix a 1% solution and use twice as much, which is what I do, or dissolve in something like alcohol.
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    Great! Thanks very much.

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    Ian Grant's Avatar
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    The normal way to make up a 2% Benzotriazole solution is:

    2% Benzotriazole / 10% Sodium Carbonate solution (Ilford IBT)
    Kodak's version was 3% Benzotriazole with sodiun Sulhite.

    Benzotriazole will dissolve easily in water above 52°C

    Ian

  6. #6
    David A. Goldfarb's Avatar
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    Edwal Liquid Orthazite is also 3% with sulfite.
    flickr--http://www.flickr.com/photos/davidagoldfarb/
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