|Monthly Tech-Tip |
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
By Edouard Bastarache
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.