Before revision: The following table shows the complexing constants log K of α-ADA compared to tetrasodium iminodisuccinate and ethylenediaminetetraacetic acid (EDTA) versus polyvalent metal ions: Metal ions MGDA IDSLanxess AG, General Product Information: Baypure EDTABASF SE, Technical Information: Trilon B Types (Dec 2013) Ba2+ 4,9 3,4 7,9 Ag+ 3,9 7,3 Sr2+ 5,2 4,1 Ca2+ 7,0 5,2 10,6 Mg2+ 5,8 6,1 8,7 Mn2+ 8,4 7,7 13,8 Fe2+ 8,1 8,2 14,3 Cd2+ 10,6 8,4 16,5 Cr3+ 9,6 Co2+ 11,1 10,5 16,3 Zn2+ 10,9 10,8 16,5 Pb2+ 12,1 11,0 18,0 Ni2+ 12,0 12,2 18,6 Cu2+ 13,9 13,1 18,8 Al3+ 14,1 16,1 Hg2+ 14,9 21,8 Fe3+ 16,5 15,2 25,1 The complex formation constants of the biodegradable chelators α-ADA and IDS are in a range suitable for industrial use, but clearly below those of the previous standard EDTA.
After revision: The following table shows the complexing constants log K of α-ADA compared to tetrasodium iminodisuccinate and ethylenediaminetetraacetic acid (EDTA) versus polyvalent metal ions: Metal ions MGDA IDSLanxess AG, General Product Information: Baypure EDTABASF SE, Technical Information: Trilon B Types (Dec 2013) Ba2+ 4.9 3.4 7.9 Ag+ 3.9 7.3 Sr2+ 5.2 4.1 Ca2+ 7.0 5.2 10.6 Mg2+ 5.8 6.1 8.7 Mn2+ 8.4 7.7 13.8 Fe2+ 8.1 8.2 14.3 Cd2+ 10.6 8.4 16.5 Cr3+ 9.6 Co2+ 11.1 10.5 16.3 Zn2+ 10.9 10.8 16.5 Pb2+ 12.1 11.0 18.0 Ni2+ 12.0 12.2 18.6 Cu2+ 13.9 13.1 18.8 Al3+ 14.1 16.1 Hg2+ 14.9 21.8 Fe3+ 16.5 15.2 25.1 The complex formation constants of the biodegradable chelators α-ADA and IDS are in a range suitable for industrial use, but clearly below those of the previous standard EDTA.