Students of physical chemistry in biochemical disciplines need biochemical examples to capture the need, not always understood, of a difficult area in their studies. The use of thermodynamic data in the chemical reference state may lead to incorrect interpretations in the analysis of biochemical examples when the analysis does not include relevant conditions to the biochemical state. The definition of a new reference state for biochemical reactions in 1994 still contends with the low number of published and consistent compilations of thermodynamic data. To fill the gap in the organized presentation of biochemical thermodynamic data, reliable sources of databases of biochemical thermodynamic data are discussed, along with textbooks and specialized academic sources.