Back to Search
Osmium Tetroxide
CAS: 20816-12-0 | O4Os
2D Structure
3D Structure
Loading 3D structure...
Basic Information
CAS Registry Number:
20816-12-0
Molecular Formula:
O4Os
Molecular Mass:
254.23 g/mol
Names and Synonyms:
Osmium Tetroxide
Osmium oxide (OsO4), (T-4)-
Osmium oxide (OsO4)
Osmium tetroxide
Osmium tetraoxide
Milas' reagent
Osmium(IV) oxide
Osmium oxide
Tetraoxoosmium
Reagents, Milas'
Identifiers:
SMILES:
[O].[O].[O].[O].[Os]
InChI:
InChI=1S/4O.Os
Key Properties
Boiling Point
130.0 °C @ Press: 760 Torr
CAS Common Chemistry
Melting Point
40.6 °C
CAS Common Chemistry
Density
4.90 g/cm³
CAS Common Chemistry
Spectral Data
NMR, IR, and Mass spectral data
1H NMR
13C NMR
Predicting NMR spectra...
10 ppm
9
8
7
6
5
4
3
2
1
0 ppm
| Shift (ppm) | Multiplicity | Integration | Assignment |
|---|
200 ppm
180
160
140
120
100
80
60
40
20
0 ppm
| Shift (ppm) | DEPT | Assignment |
|---|
Note: These NMR spectra are predicted computationally and may differ from experimental data. Predictions are based on chemical environment analysis.
All Properties
Comprehensive physical and chemical properties
| Property | Value | Source |
|---|---|---|
| Molecular Mass | 254.23 g/mol | CAS Common Chemistry |
| 254.226 g/mol | RDKit | |
| 255.94113918 g/mol | RDKit | |
| Density | 4.90 g/cm³ | CAS Common Chemistry |
| 4.9 g/cm3 | CAS Common Chemistry | |
| Wikipedia Url | https://en.wikipedia.org/wiki/Osmium_tetroxide | CAS Common Chemistry |
| Boiling Point | 130.0 °C @ Press: 760 Torr | CAS Common Chemistry |
| Canonical SMILES | O=[Os](=O)(=O)=O | CAS Common Chemistry |
| InChI | InChI=1S/4O.Os | CAS Common Chemistry |
| InChI Key | InChIKey=VUVGYHUDAICLFK-UHFFFAOYSA-N | CAS Common Chemistry |
| Melting Point | 40.6 °C | CAS Common Chemistry |
| Name | Osmium tetroxide | CAS Common Chemistry |
| Heavy Atom Count | 5 | RDKit |
| Hydrogen Bond Acceptors | 0 | RDKit |
| Hydrogen Bond Donors | 0 | RDKit |
| Rotatable Bonds | 0 | RDKit |
| Aromatic Ring Count | 0 | RDKit |
| Topological Polar Surface Area | 114.0 Ų | RDKit |
| LogP | -0.4777 | RDKit |
| Molar Refractivity | 2.746 | RDKit |
