In the title compound, C(40)H(66)O(4), the C and O atoms of the propinyl and dodecoxyl substituents are nearly coplanar with the benzene ring, 1.735 (6), 8.804 (1), 8.786 (1) and 9.577 (3)°, respectively. In the crystal, mol-ecules are connected by inter-molecular O-H⋯O hydrogen bonds.