(R(P))-Menthyl (1-hydroxy-cyclo-hexyl)phenyl-phosphinate.

The title compound, C(22)H(35)O(3)P, features a tetra-hedral P atom bonded to a phenyl ring, a hydroxy-cyclo-hexyl unit and the O atom of a menthyl group. The axial chirality at phospho-rus is R(P). In the crystal, mol-ecules are connected through O-H⋯O hydrogen bonds involving the hydr-oxy and P=O groups, forming chains along the 2(1) screw axis. The methyl groups of the isopropyl fragment in the menthyl unit are disordered over two sites of equal occupancy.