Project Details The IUPAC Green Book - Preparation of the 4th Edition

Project No.:
Start Date:
01 November 2014
End Date:


The ‘Quantities, Units and Symbols in Physical Chemistry’, or so-called Green Book, is among the most successful IUPAC color books. While there is constant demand for updates and corrections, this project will aim at developing a fourth edition including updates from the latest 2011 printing. This will be the last corrected printing before an enlarged and digitally native edition is conceived.


The 3rd edition of the Green Book was first released in 2007, and reprinted twice, once in 2008 and with minor revisions, and again in 2011 without corrections. The 2008 version (prepared for the second printing) was also released as a full searchable PDF made available for download from the IUPAC website.

The constant demand for changes and corrections is mainly due to an increased referencing of the Green Book within IUPAC and also outside the Union; on one hand, the increased referencing makes incoherences with other IUPAC documents be detected more frequently; on the other hand, it urges for an improved homogeneous presentation of IUPAC Recommendations and Technical Reports, as the Green Book is a standard reference.


Sep 2019 update – The Task group and Commission I.1 met in Paris in July 2019 during the IUPAC General Assembly. With the impetus of releasing an edition timed with the IUPAC centenary, the group nearly completed the preparation of the 4th edition. This edition will also include all the updates triggered by the revised SI units (released in May 2019) and the immediate consequences of these changes to the tables. A release is expected in 2020.
Simultaneously, work on the preparation of an abridged version has also progressed (project 2007-032-1-100) and publication is also expected for 2020.

Nov 2019 update – A longer-term plan to develop a digital native edition is being developed under project 2019-001-2-100

Page last updated 14 Feb 2020