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Hafnium Oxide Toxicty
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
Compounds used in
Toxicology of Hafnium
Routes of Entry :
Inhalation, skin, and ingestion.
Effects of Overexposure
May cause pulmonary irritation. Coughing
or sneezing may occur.
II-Dermal/Eye Contact :
May cause irritation, inflammation may
Ingestion may cause some discomfort.
Hafnium is considered relatively non-toxic due to poor absorption
of it in the alimentary tract of mammals.
Chronic Exposure :
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
Medical Conditions Generally
Aggravated by Exposure :
Previous respiratory and eye
Hafnium oxide is not considered a
carcinogen by official regulatory bodies.
Quebec's Exposure Limits
VEMP : 0.5 mg/m³
1-Occupational Medicine,Carl Zenz,
2-Clinical Environmental Health and
Toxic Exposures, Sullivan & Krieger; last edition.
3-Sax's Dangerous Properties of
Industrial Materials, Lewis C., last edition.
4-Toxicologie Industrielle et
Intoxications Professionnelles, Lauwerys R.R. last
5-Chemical Hazards of the Workplace,
Proctor & Hughes, 4th edition
Out Bound Links
Edouard Bastarache M.D.
Occupational & Environmental Medicine
Author of "Substitutions for Raw Ceramic Materials"
Tracy, QuÃ©bec, CANADA