https://reptox.cnesst.gouv.qc.ca/pages/fiche-complete.aspx?no_produit=6536&nom=N-Nitrosomorpholine Canada toxicological data sheet N-nitrosomorpholine
--- https://www.anses.fr/fr/system/files/EAUX2012sa0172.pdf 2012 France French water supply drinking water consensus N-nitrosomorpholine nitrosamines carcinogens, environmental mutagens threshold limit values