Osmium
Also known as: EINECS 231-114-0, MFCD00011147, OSMIUM, OSMIUM ATOMIC ABSORPTION STANDARD, OSMIUM METAL, OSMIUM PLASMA EMISSION SPECTROSCOPY STANDARD, OSMIUM STANDARD, OsMiuM, 99.9%, (trace Metal basis), Osmium AAS standard solution, Os 1000μg/mL, Osmium plasma standard solution, Os 1000μg/mL, Osmium powder, Osmium powder, 99.8% trace metals basis, OsmiumpowderNmesh, metallicosmium, osmium atom
Osmium (CAS 7440-04-2) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula Os and a molecular weight of 190.230 g/mol. Key properties include a melting point of 3045 °C(lit.), a boiling point of 5027 °C(lit.) and a density of 22,48 g/cm3. It is classified under GHS with signal word Danger and hazard statements H228, H315 — Causes skin irritation and H318 — Causes serious eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 7440-04-2
- Jingsj CID
- J-19984-1
- Molecular Formula
- Os
- Molecular Weight
- 190.230 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 3045 °C(lit.) |
|---|---|
| Boiling Point | 5027 °C(lit.) |
| Density | 22,48 g/cm3 |
| Exact Mass | 191.961502 |
| Appearance | sponge |
GHS Safety & Compliance
- H228
- H315 — Causes skin irritation
- H318 — Causes serious eye damage
- H335 — May cause respiratory irritation
Frequently Asked Questions
What is the CAS number of Osmium?
The CAS number of Osmium is 7440-04-2.
What are the molecular formula and molecular weight of Osmium?
Osmium has molecular formula Os and molecular weight 190.230 g/mol.
Is Osmium hazardous?
Osmium has GHS signal word Danger and hazard statements H228; H315 — Causes skin irritation; H318 — Causes serious eye damage.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Osmium (CAS 7440-04-2)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-19984-1 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.