Abstract: The International Union of Pure and Applied Chemistry (IUPAC) is an organization "serves to advance the worldwide aspects of the chemical sciences and to contribute to the application of chemistry in the service of Mankind". It has published a number of recommendations regarding the reporting of NMR data, such as chemical shifts, referencing procedures, unified scale, standard state, magic angle spinning (MAS) and referencing in solids. In 2008, IUPAC provided the latest 17 recommendations as a supplement to those that were not discussed in detail in the past conventions. The recommendations included temperature and solvent effects on chemical shift, referencing, magnetic susceptibility correction, comments on Ξ values of frequency ratio, and referencing in solids.

Key words: NMR, convention, IUPAC, chemical shift, shielding constant