Controlled vocabulary used for indexing bibliographical records dealing with chemistry in the PASCAL database (1972-2015). It is aligned with the terms of the ChEBI (Chemical Entities of Biological Interest), RXNO (name reaction ontology), MOP (molecular process ontology), REX (Physico-chemical process), FIX (Physico-chemical methods and properties), ontologies and the terms of the IUPAC Gold Book. This resource contains 9150 entries in 2 languages (English and French) grouped under 21 collections.