SECTION XI -- TOXICOLOGICAL PROPERTIES
Nickel and cobalt are classified as Category 3 carcinogens. The exposure route of concern is inhalation. Hexavalent Chromium (a known human inhalation carcinogen - EU Category 2) may be generated during processing activities.
As shipped, these complex alloys in massive form have no known toxicological properties other than causing allergic reactions in individuals sensitive to the metal(s) contained in the alloys. However, user-generated dusts and fumes may on contact with the skin or eyes produce mechanical irritation. Chronic exposures coupled with sweat could cause dermatitis (skin) or conjunctivitis (eyes). Excessive inhalation of user-generated fumes from high temperature cutting, remelting or welding of these alloys may, depending on the specific features of the process used, pose a long-term health hazard. The International Agency for Research on Cancer (IARC) has concluded that welding fumes are possibly carcinogenic to humans.
The ingredients of fumes and gases generated in user welding, grinding and high temperature cutting operations will depend on the base metal, electrode, flux and the specific process being used. Ingredients may include metals, metal oxides, chromates, fluorides, carbon monoxide, ozone, and oxides of nitrogen. Phosgene can be produced if chlorinated solvent vapors are present in user operations.