The legally effective occupational exposure limit values (OELs) for the evaluation of hydrocarbon mixtures in Germany using the RCP methodology are published in the Joint Ministerial Gazette (GMBl, date: 30.11.2017). FoBiG carried out the revision and based on this work commented on the publication by McKee and colleagues "The reciprocal calculation procedure for occupational exposure limits for hydrocarbon solvents: an update" and compared them with the standards in force in Germany. The letter to the Editor is published here.