A. International Union of Pure and Applied Chemistry (IUPAC) is an international non-governmental organisation established in 1919 devoted to the advancement of chemistry.
Many national chemistry societies are members of the IUPAC.
It is a well-known recognised authority in developing standards for the naming of the chemical elements and their compounds, through its Interdivisional Committee on Nomenclature and Symbols (IUPAC nomenclature).
It is a member of the International Council for Science.