International Union of Pure and Applied Chemistry (IUPAC)
- Country: Switzerland
- Type: Organization
- Website: www.iupac.org
- Update: 05-02
The International Union of Pure and Applied Chemistry (IUPAC), a member of the International Council for Science (ICSU), was founded in 1919 and is headquartered in Zurich, Switzerland, and is dedicated to promoting the advancement of chemistry globally, including the harmonization and standardization of nomenclature in the field of chemistry, and the publication of chemistry-related literature.