Table 1.

Conditional constants (K) for various anions for the equilibria: 1·EY + Anion = 1·Anion + EY, as measured by the indicator displacement assay in water at pH 7.0.

Anion	K, M −1a
Citrate	6.5 × 105
Oxalate	1.9 × 105
Glutamate	1.0 × 105
Phosphate	3.9 × 104
Adipate	1.6 × 104
Tartrate	7.9 × 103
Acetate	1.9 × 103
Benzoate	3.9 × 102

^aEstimated deviations are less than 15% (based on the standard deviation from the fit of experimental values).