Ferric ammonium oxlate stability

[John Fontana]

Anyone able to tell me how long a working solution of ferric ammonium oxalate is stable in a stoppered brown bottle. Making up 10 Gms in 25 mls of water is going to last me weeks rather than days at my rate of output!
Thanks
John Fontana

 

[matt miller]

It should be ok for a few months if stored right. I keep mine on a dark cool shelf in my darkroom. It usually takes me a couple of months to use a 25ml batch.

 

[photomc]

Not a real test, but I used one bottle for well over 12 months - brown glass bottle, kept tightly capped. Current bottle is over 8 months old, going strong.