PubChem uses the latest IUPAC atomic mass
PubChem
now uses the latest IUPAC recommendations for atomic mass and isotopic
composition information. In addition, the allowed isotopes for a given element
are restricted to those with a half-life of one millisecond or greater. These
changes affect the molecular weight values computed for nearly all compounds in
PubChem. To learn more, please read this
post.
Source: PubChem News - Category: Chemistry Authors: PubChem Source Type: news