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7440-04-2

Basic Information
CAS No.: 7440-04-2
Name: Osmium
Molecular Structure:
Molecular Structure of 7440-04-2 (Osmium)
Formula: Os
Molecular Weight: 190.20
Synonyms: NSC 607770;NSC 607771;NSC 607772;
EINECS: 231-114-0
Density: 22.48 g/cm3
Melting Point: 3045 °C(lit.)
Boiling Point: 5027 °C(lit.)
Flash Point:
Solubility:
Appearance:
Hazard Symbols: Highly toxic; irritant to skin.
Risk Codes:
Safety: Poison by intravenous route. An irritant to eyes and mucous membranes. The principal effects of exposure are ocular disturbances and an asthmatic condition caused by inhalation. Furthermore, it causes dermatitis and ulceration of the skin upon contact. When osmium is heated, it gives off a pungent, poisonous fume of osmium tetroxide. One case of osmium poisoning reported in the literature resulted from the inhalation of osmium, which gave rise to a capillary bronchitis and dermatitis. The tetroxide vapor has a pronounced and nauseating odor that should be taken as a warning of a possibly toxic concentration in the atmosphere, and personnel should immediately move to an area of fresh air. The metal itself is not highly toxic. Flammable in the form of dust when exposed to heat or flame. Slight explosion hazard in the form of dust when exposed to heat or flame. Violent reaction or ignition with chlorine trichloride or oxygen difluoride. Ignites when heated to 100°C with fluorine. Incandescent reaction in phosphorus vapor. When heated to decomposition it emits toxic fumes of OsO4. See also OSMIUM TETROXIDE.
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