The International Union of Pure and Applied Chemistry (IUPAC) is a global organization that aims to advance the chemical sciences. Founded in 1919, it provides a common language for chemists and promotes international collaboration in research and education. IUPAC is responsible for establishing standardized nomenclature, terminology, and measurement methods in chemistry. IUPAC also plays a crucial role in the development of new chemical standards and guidelines. It organizes conferences, publishes scientific journals, and collaborates with other scientific organizations to ensure that chemistry remains a vital and evolving field. Through its efforts, IUPAC helps facilitate communication among chemists worldwide.