HAFNOCENE DICHLORIDE
Flammability | 1 | |
Toxicity | 2 | |
Body Contact | 2 | |
Reactivity | 1 | |
Chronic | 2 | |
SCALE: Min/Nil=0 Low=1 Moderate=2 High=3 Extreme=4 |
Catalyst.
C10-H10-Cl2-Hf, (C5H5)2HfCl2, "bis(cyclopentadienyl)hafnium dichloride", "hafnium,
dichlorobis(eta(5)-2, 4-cyclopentadien-1-yl)-", "hafnium, dichlorobis(eta(5)-2, 4-
cyclopentadien-1-yl)-", "dichlorobis(eta(5)-2, 4-cyclopentadien-1-yl)hafnium",
"dichlorobis(eta(5)-2, 4-cyclopentadien-1-yl)hafnium", "dichlorobis(eta(5)-cyclopenta-2,
4-dien-1-yl)hafnium", "dichlorobis(eta(5)-cyclopenta-2, 4-dien-1-yl)hafnium",
"dichlorobis(eta(5)-cyclopenta-1, 4-diene-1-yl)hafnium", "dichlorobis(eta(5)-cyclopenta-1,
4-diene-1-yl)hafnium", "bis(cyclopentadienyl)hafnium (IV) dichloride",
"bis(cyclopentadienyl)hafnium (IV) dichloride", dichlorobis(eta-cyclopentadienyl)hafnium,
dichlorobis(eta(5)-cyclopentadienyl)hafnium, dichlorobis(cyclopentadienyl)hafnium,
dichlorodi-pi-cyclopentadienylhafnium, dichlorodicyclopentadienylhafnium,
dichlorohafnocene, "dicyclopentadienylhafnium dichloride", "hafnium dicyclopentadiene
dichloride", "di(cyclopentadienyl)hafnium dichloride", metallocene
Although ingestion is not thought to produce harmful effects, the material may still be damaging to the health of the individual following ingestion, especially where pre- existing organ (e.g. liver, kidney) damage is evident. Present definitions of harmful or toxic substances are generally based on doses producing mortality (death) rather than those producing morbidity (disease, ill-health). Gastrointestinal tract discomfort may produce nausea and vomiting. In an occupational setting however, ingestion of insignificant quantities is not thought to be cause for concern. Considered an unlikely route of entry in commercial/industrial environments. Hafnium concentrates in the liver and skeleton; it can cause liver damage.
Although the material is not thought to be an irritant, direct contact with the eye may produce transient discomfort characterized by tearing or conjunctival redness (as with windburn).
The material is not thought to produce adverse health effects or skin irritation following contact (as classified using animal models). Nevertheless, good hygiene practice requires that exposure be kept to a minimum and that suitable gloves be used in an occupational setting. Solution of material in moisture on the skin, or perspiration, mayincrease irritant effects.
The material is not thought to produce adverse health effects or irritation of the respiratory tract (as classified using animal models). Nevertheless, good hygiene practice requires that exposure be kept to a minimum and that suitable control measures be used in an occupational setting. Persons with impaired respiratory function, airway diseases and conditions such as emphysema or chronic bronchitis, may incur further disability if excessive concentrations of particulate are inhaled. Injections of hafnium oxide or carbide into airways may causescarring of the lungs.
Principal routes of exposure are usually by skin contact/absorption and inhalation of generated dust. Prolonged ingestion of hafnium is moderately toxic. Theremay be liver changes.