7439-88-5 Iridium

Name: Iridium
Synonyms: Iridiumblack
CAS Number:7439-88-5
Molecular Formula:Ir
Molecular Weight:192.22
EINECS:231-095-9
Density:1.05 g/mL at 25ºC
Boiling Point:4130ºC(lit.)
Flash Point:
Safety Description:The pure metal is clinically inert. Most of its compounds are poorly soluble in water and thus are not absorbed efficiently by the body. The chlorides are poison or moderately toxic by ingestion and are eye and skin irritants. There are no reports of acute or chronic health effects to workers handling iridium and its compounds. The ¹⁹⁰Ir and ¹⁹²Ir radioisotopes are used in clinical radiography and most references to the toxicity of iridium relate to these isotopes.

A catalytic metal. The powdered metal may ignite spontaneously in air. Violent reaction or ignition on contact with interhalogens (e.g., bromine pentafluoride, chlorine trifluoride). Alloys with zinc, after extraction with acids, leave heat-sensitive explosive residues. Is attacked by F₂, Cl₂ at red heat, by potassium sulfate or a mixture of potassium hydroxide and nitrate on fusion, lead, zinc, tin.
liansport Information:UN 1789