[Alt-photo] oxalate ferric problem

Mike Ware mike at mikeware.co.uk
Sun Mar 6 10:59:39 UTC 2016

Your substance is ferrous oxalate, aka iron(II) oxalate dihydrate, FeC2O4.2H2O,  NOT ferric oxalate, aka iron(III) oxalate, Fe2(C2O4)3.xH2O.
It won’t work. It is, in fact, the same as the photoproduct.
Those Roman numerals matter!

> Gilles Thanks for your reply.
> After seeing and reading about ferric oxalate, is that: my ferric oxalate powder yellow but B & S and DISACTIS is green. I think my Oxalate is not adequate.
> My container says: OXALATE IRON II 2-HYDRATE and its chemical formula is Fe (COO) 2.2H2O
> I left stirring overnight at room temperature but 10 ° C. He is now resting, but the result is the same, in the bottom of the container, yellow mud and on top, water with light yellow.
> I try to find a new batch of oxalate.
> Thanks to all.
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