PRODUCT Properties
| Melting point: | 3045 °C (lit.) |
| Boiling point: | 5027 °C (lit.) |
| Density | 22.61 g/cm3 (lit.) |
| solubility | soluble in aqua regia |
| form | sponge |
| color | Black |
| Specific Gravity | 22.48 |
| Water Solubility | attacked by aqua regia; barely affected by HCl, H2SO4 [MER06] |
| Merck | 13,6960 |
| Exposure limits | ACGIH: Ceiling 2 ppm OSHA: Ceiling 5 ppm(7 mg/m3) NIOSH: IDLH 50 ppm; Ceiling 5 ppm(7 mg/m3) |
| InChI | InChI=1S/Os |
| InChIKey | SYQBFIAQOQZEGI-UHFFFAOYSA-N |
| SMILES | [Os] |
| Hardness, Vickers | 670 |
| Modulus of Elasticity | 560 GPa |
| Hardness, Brinell | 580, Converted from Vickers for 3000 kg load/10 mm ball Brinell test. |
| Hardness, Rockwell A | 80, Converted from Vickers. |
| Hardness, Rockwell C | 57, Converted from Vickers. |
| Hardness, Knoop | 822, Converted from Vickers. |
| CAS DataBase Reference | 7440-04-2(CAS DataBase Reference) |
| EPA Substance Registry System | Osmium (7440-04-2) |
Description and Uses
Osmium is silvery white, hard transition metals with a high melting point. osmium is one of the rarest elements on earth.
Because of its hard brittle nature, the metal osmium has few uses. However, the powderedform can be sintered under high pressure and temperatures to form some useful products,despite its toxicity and malodor. Its main use is as an alloy to manufacture devices that resistwear and stand up to constant use. As an alloy, osmium loses both its foul odor and toxicity.Some of these products are ballpoint and fountain pen tips, needles for record players, andpivot points for compass needles. Osmium alloys are also used for contact points on specialswitches and other devices that require reduced frictional wear.
Another use is as a stain for animal tissues that are to be examined with a microscope toimprove the contrast of the specimen.
Safety
| Symbol(GHS) |    GHS02,GHS05,GHS07 |
| Signal word | Danger |
| Hazard statements | H228-H315-H318-H335 |
| Precautionary statements | P210-P240-P241-P280-P302+P352-P305+P351+P338 |
| Hazard Codes | F,Xi |
| Risk Statements | 11-37/38-41-36/38 |
| Safety Statements | 16-26-36/37/39 |
| RIDADR | UN 3089 4.1/PG 2 |
| WGK Germany | - |
| RTECS | RN1100000 |
| TSCA | Yes |
| HazardClass | 4.1 |
| PackingGroup | II |
| HS Code | 71104100 |
| Hazardous Substances Data | 7440-04-2(Hazardous Substances Data) |
| Toxicity | LDLo ivn-dog: 17 mg/kg SMSJAR 26,131,1826 |
| Limited Quantities | 1.0 Kg (2.2 lbs) |
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) |
