BZT mixing

Colin Graham

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• Jul 16, 2005

• #1

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.

 

Peter Schrager

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• Jul 16, 2005

• #2

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

 

David A. Goldfarb

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• Jul 16, 2005

• #3

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.

 

OP

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Colin Graham

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• Jul 16, 2005

• #4

Great! Thanks very much.

 

Ian Grant

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• Jul 16, 2005

• #5

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

 

David A. Goldfarb

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• Jul 16, 2005

• #6

Edwal Liquid Orthazite is also 3% with sulfite.