| abstract |
The present invention (A) 90-99.9% by weight of L- and D-methyl glycine diacetate (MGDA), or their respective mono-, di- or trialkali metals, or mono-, di- or triammonium salts. A mixture of enantiomers, mainly containing each L-isomer having an enantiomeric excess (ee) in the range of 10-99%, and (B) 0.1-10% by weight in total A diacetate derivative of at least one amino acid selected from valine, leucine, isoleucine and tyrosine as free acid, or the respective mono-, di- or trialkali metal salts, or mono-, di- or tri For mixtures containing ammonium salts, the percentage is based on the sum of (A) and (B). |