Osmium

Transition metals · Group 8 · Period 6

Atomic properties

Atomic number	76
Symbol	Os
Standard atomic weight	190.23
Classification	Transition metals
Group	8
Period	6
Block	d-block
Electron configuration	[Xe] 4f14 5d6 6s2
Electronegativity (Pauling)	2.20
Common oxidation states	+4, +3

Physical properties

Phase at 20 °C	Solid
Density	22.59 g/cm³
Melting point	3033 °C
Boiling point	5012 °C
Discovered	1803
CAS number	—

Need a material? Ask us for a written proposition.

Any metal, powder, wire, oxide or purity. Stock is held in high-security bonded storage at Zurich Airport — no import duties or VAT while goods stay in bond, any quantity, in-house air, sea, land and express logistics. Written trade inquiries only.