AbstractThe stabilities of the complexes formed by hinokitiol (β‐isopropyl tropolone) and bivalent metals, Cu, Pb, Zn, and Ni, were studied stepwisely by means of potentiometric titration with glass electrode. The stability constants, K1and K2for copper, zinc and lead‐hinokitiol complexes, (M. Hin)+and (M. Hin2), and K1, K2and K3for nickel complexes, (M. Hin)+, (M. Hin2) and (M. Hin3)−, were evaluated from the pH values ob