equilibrium association constant

symbols: $K_{\rm{a}}$, $K_{\rm{ass}}$; unit: $\pu{L mol-1}$
https://doi.org/10.1351/goldbook.14131
Ratio, at equilibrium, of \([\ce{AB}]/[\ce{A}][\ce{B}]\) for the reversible binding interaction of \(\ce{A}\) and \(\ce{B}\) to yield the complex \(\ce{AB}\).
Note: Equal to \(1/K_{\rm{d}}\), or \(k_{\rm{on}}/k_{\rm{off}}\).
Source:
PAC, 2011, 83, 1129. (Glossary of terms used in biomolecular screening (IUPAC Recommendations 2011)) on page 1139 [Terms] [Paper]
Citation: 'equilibrium association constant' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.14131 RIS BibTex EndNote
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