CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Bluish-white lustrous solid; [Merck Index] Greyish or bluish-white metal or powder; [MSDSonline] |
|---|---|
| Color/Form | Blue-white metal |
| Boiling Point | 5012 °C |
| Melting Point | 3033 °C |
| Solubility | Insoluble in acids and aqua regia; attacked by fused alkalis |
| Density | 22.59 g/cu cm |
| Vapor Pressure | 1.8 Pa (mm Hg) at 3050 °C |
| Stability/Shelf Life | Stable in air in the cold; when finely divided, is slowly oxidized by air even at ordinary temperature to form tetroxide. |
| Decomposition | When heated to decomposition it emits toxic fumes of /osmium tetraoxide/. |
| Other Experimental Properties | Ionic radius, 69 pm; crystal structure, hexagonal close packed; lattice constant, 273.41 pm; thermal expansion, 6.10X10+6 °C-1; magnetic susceptibility, 5.2X10-8 cu cm/g; Young's modulus, 5.56X10+8 kN/sq m; Poisson's ratio, 0.28; Vicker's hardness, 300-670; temperature coefficient of resistance 4.2X10-3 K-1; electrical resistivity at 0 °C, 8.12 microohm-cm; thermal conductivity, 88 W/m K |
| Chemical Classes | Metals -> Elements, Metallic |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Flame Flammables GHS02  Corrosion Corrosives GHS05  Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H228:Flammable solids H315:Skin corrosion/irritation H318:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P240:Ground/bond container and receiving equipment. P241:Use explosion-proof electrical/ventilating/lighting/…/equipment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
COMPUTED DESCRIPTORS
| Molecular Weight | 190.2 g/mol |
|---|---|
| Hydrogen Bond Donor Count | 0 |
| Hydrogen Bond Acceptor Count | 0 |
| Rotatable Bond Count | 0 |
| Exact Mass | 191.96148 g/mol |
| Monoisotopic Mass | 191.96148 g/mol |
| Topological Polar Surface Area | 0 Ų |
| Heavy Atom Count | 1 |
| Formal Charge | 0 |
| Complexity | 0 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
Osmium(3+) is a monoatomic trication.