Potassium Bichromate expiry question

Philip A Litke

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Apr 7, 2017
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Calgary
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I have some potassium Bichromate from photographers formulary I mixed up a few years ago . it has been sealed in a jar - though stupid me, I put it in a clear jar. Can I still use it - or evaporate it and start again - or should I just start over ?
 

carioca

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Nov 16, 2005
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Paris
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It should be ok.
What is sensible to UV is organic matter in presence of the dichromate, not the dichromate powder or solution itself.
Edit: regardless of amber or clear glass storage.
Sidney
 

BJ68

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Mar 16, 2016
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Switzerland
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It will not decompose (chemically) the only "risk" if you made a diluted solution, is that you get a other concentration or even a saturated solution (with sediment; "Bodensatz" in German) , because a part of the water is evaporated.

bj68
 
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