Other hafnium compounds have caused liver damage in animals on prolonged feeding. Prolonged or repeated exposure may affect the nervous system, with difficulty in walking and balancing, weakness or cramps in the legs, hoarseness of the voice, trouble with memory or judgement, unstable emotions or unusual irritability. The respiratory system may also be affected by a pneumonia like illness with symptoms of coughing, fever, chills, body ache, chest pain and other common signs of pneumonia. Oxides of molybdenum have caused irritation of the eyes, nose, and throat, weight loss, and digestive disturbances in experimental animals. Fumes are respiratory irritants and may cause respiratory disease.
Skin contact can also cause an allergic skin rash.
Nickel and its compounds have been reported to cancer of the lungs and sinuses. May cause irritation of the eyes, nose, throat and skin. Can cause irritation of the eyes, nose, and throat in high concentra-tions. Slight lung changes may occur. Dust and fume may cause irritation of the eyes, nose, throat, and respiratory tract.