Magnesium salt of EDTA is the same as EDTA-2NaMg?

[Baho Ilok]

I was reading through the standard complexiometric method of determining hardness in water, and the procedure mentioned the use of the magnesium salt of EDTA. I looked up online to purchase this reagent but all I could find was disodium magnesium salt of EDTA. Are they one and the same? Thanks!

 

[Borek]

For this purpose they are equivalent.

Not that this particular salt is really required, just EDTA (or disodium salt) can be used as well. Magnesium salt makes detection of the endpoint against the Eriochrome Black T easier.

 

[Baho Ilok]

For this purpose they are equivalent.

Not that this particular salt is really required, just EDTA (or disodium salt) can be used as well. Magnesium salt makes detection of the endpoint against the Eriochrome Black T easier.

Beautiful! Thank you for this!