Vanadium to be listed on the National Pollutant Release Inventory without CAS registry number: Notification

Beginning in 2018, the chemical abstracts service registry number (CAS RN) for vanadium (and its compounds except when in an alloy) will be removed from the National Pollutant Release Inventory (NPRI) listing. The purpose of this change is to capture vanadium in compounds and align it with the listings for other metal groupings. The CAS RNs for vanadium and vanadium compounds in commerce in Canada can be found using the substances search tool.

“Vanadium (fume or dust)” with the CAS RN 7440-62-2 was on the NPRI substance list from 1993 to 2000. In 2001, the substance name was changed to “vanadium (and its compounds, except when in an alloy)” with the same CAS RN. However, since this CAS RN refers to elemental vanadium, it does not include vanadium compounds. Other metal and metal compounds on the NPRI substance list are listed without specific CAS RNs to capture the equivalent weight of the metal in compounds, as well as the weight of the pure metal.

To obtain a copy of the full notification, please contact the NPRI.