It is also a potential electron donor in various oxide materials, including ZnO, SnO2, CdO, MgO, ZrO2, HfO2, La2O3, Y2O3, TiO2, SrTiO3, LaAlO3, SiO2, Al2O3, ZrSiO4, HfSiO4, and SrZrO3.
Temperatura trojne točke vodikovega ravnotežja je na mednarodni temperaturni skali (ITS 1990) definirana kot 13,8033 kelvina.