4 replies to this topic

[samita]

What is difference between EDTA and HEDTA.???

[Gerard]

ethylenediaminetetraacetic acid
(2-Hydroxyethyl)ethylenediaminetriacetic acid

[Prep!]

ya right.. and there is no apparant difference between the two apart from the fact that HEDTA should be easily soluble in water unlike EDTA because of the presence of hydroxyl groups!!!

[mdfenko]

Pradeep Iyer, on Oct 26 2009, 06:22 AM, said:

ya right.. and there is no apparant difference between the two apart from the fact that HEDTA should be easily soluble in water unlike EDTA because of the presence of hydroxyl groups!!!

and hedta is a triacetic acid whereas edta is a tetraacetic acid. this will lead to differing affinities for cations.

Edited by mdfenko, 26 October 2009 - 07:10 AM.

[Prep!]

mdfenko, on Oct 26 2009, 08:39 PM, said:

Pradeep Iyer, on Oct 26 2009, 06:22 AM, said:

ya right.. and there is no apparant difference between the two apart from the fact that HEDTA should be easily soluble in water unlike EDTA because of the presence of hydroxyl groups!!!

and hedta is a triacetic acid whereas edta is a tetraacetic acid. this will lead to differing affinities for cations.

ya right!!! i missed that.. but i saw many research articles which have used both the compounds and found that there was no apparant difference in their affinities!!!