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Re: How much Fe in FeEDTA?

> EDTA has 4H's, 4O's 2N's. but when it form FeEDTA, it lose it's four H's.
> and it become   ? + [Fe(+3)(EDTA)]-
> if so... then what do they use for cation?
> Na? K?

FeEDTA is 15.21% (Merck Index, although one can calculate this out). The 
cation you asked about is Na+ (at least in the common commercially 
available form)... in case you're curious the full formula is C10 H12 Fe N2 
Na O8

-Greg Morin

Gregory Morin, Ph.D.  ~~~~~~~Research Director~~~~~~~~~~~~~~
Seachem Laboratories, Inc.      www.seachem.com     888-SEACHEM