AQUEOUS SOLUTION OF A SODIUM SALT OF N- (2-HYDROXYETHYL) ETHYLENEDIAMINE-N, N', N'-TRIACETIC ACID, USE AND PREPARATION THEREOF, AND A CONTAINER COMPRISING SAID AQUEOUS SOLUTION

摘要

The invention relates to an aqueous solution of a sodium salt xNayHof the chelating compound, (I)of formula (I): wherein x =2.1-2.7, =0.9-0.3, and x + =3. The invention further pertains to a container comprising at least 0.5kg of said aqueous solution and to a method of preparing an aqueous solution comprising at least 45wt% of the sodium salt xNayHof the chelating compound of formula (I) from Na-HEDTA, comprising the steps of electrodialysing an aqueous solution containing less than 42 wt.% of Na-HEDTA using a bipolar membrane, thereby converting the trisodium salt solution to the solution of the sodium salt of formula (I) with x = 2.1-2.7, = 0.9-0.3, and x + =3.