Potassium Bichromate expiry question

[Philip A Litke]

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]

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]

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

 

[Philip A Litke]

perfect, thank you
I will just have to give it a go

 

[koraks]

It will be perfectly fine. The staff lasts forever, also in solution. If the jar was closed properly, evaporation is not a concern.