Sostanza soggetta a restrizioni secondo l’Allegato XVII in base all’appartenenza alla classe "Nickel e i suoi composti".
Note E, H.
American Conference of Governmental Industrial Hygienists (ACGIH). Threshold Limit Values and Biological Exposure Indices. Cincinnati, OH 2019.
National Library of Medicine. ChemIDplus: http://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp