Toll definition, a payment or fee exacted by the state, the local authorities, etc., for some right or privilege, as for passage along a road or over a bridge. See more. Dictionary.com
The International Union of Pure and Applied Chemistry (IUPAC, /ËaÉªjuËpÃ¦k/ or /ËjuËpÃ¦k/) is an international federation of National Adhering Organizations that represents chemists in individual countries. It is a member of the International Council for Science (ICSU).
IUPAC works To simplify the work of natural scientists by developing standards and recommendations for chemical nomenclature and issues related to atomic masses, chemistry education, etc. Since 1960, IUPAC has published the journal Pure and Applied Chemistry, where IUPAC recommendations and recommendations are published.