Synonym: Hafnium Dioxide
CAS # 12055-23-1
Hafnium (Hf) is found in association with zirconium ores, production based on zircon (ZrSiO4) concentrates which contain 0.5% to 2% hafnium. This metal has outstanding corrosion resistance accounting for some of its major applications.
Inhalation, skin, and ingestion.
May cause pulmonary irritation. Coughing or sneezing may occur.II-Dermal/Eye Contact
May cause irritation, inflammation may occur.III-Ingestion
Ingestion may cause some discomfort. Hafnium is considered relatively non-toxic due to poor absorption of it in the alimentary tract of mammals.
It may cause liver damage. It may also cause a benign pneumoconiosis by dust accumulation, without fibrosis and ventilatory effect, and without special predisposition to tuberculosis and/or lung cancer as encountered in silicosis and abestosis.
Previous respiratory and eye disorders.
Hafnium oxide is not considered a carcinogen by official regulatory bodies.
VEMP : 0.5 mg/m³
Article by Edouard Bastarache
Edouard Bastarache is a well known doctor that has written many articles on the subject of toxicity of ceramic materials and books on technical aspects of ceramics. He writes in both English and French.
By Edouard Bastarache