the stability constants of the complexes formed between the anion of 1,6-hexamethylenediamine-n , n , n ' , n'-tetra ( methylenephosphonic ) acid and some transition and non-transition metal ions have been measured potentiometrically at a temperature of 25 degrees and an ionic strength of 0.1m ( kno ( 3 ) ) .
C0003075
anion
C0022023
ions