PRODUCT Properties
| Melting point: | 1495°C |
| Boiling point: | 2900 °C (lit.) |
| Density | 8.9 g/mL at 25 °C (lit.) |
| bulk density | 850kg/m3 |
| vapor pressure | 0Pa at 20℃ |
| storage temp. | no restrictions. |
| solubility | H2O: soluble |
| form | wire |
| color | Pink to red to violet |
| Specific Gravity | 8.9 |
| Flame Color | Silvery white |
| Resistivity | 6.24 μΩ-cm, 20°C |
| Water Solubility | insoluble |
| Merck | 13,2452 |
| Exposure limits | TLV-TWA 0.05 mg as Co/m3 (ACGIH) PEL-TWA: 0.05 mg as Co/m3 (NIOSH, OSHA) TLV-STEL 0.1 mg as Co/m3 (ACGIH) IDLH 20 mg as Co/m3 (NIOSH) . |
| Stability: | Stable, but pyrophoric in air when finely divided. Incompatible with acetylene, hydrazinium nitrate, oxidizing agents, acids. |
| InChI | 1S/Co |
| InChIKey | GUTLYIVDDKVIGB-UHFFFAOYSA-N |
| SMILES | [Co] |
| Modulus of Elasticity | 211 GPa |
| Poissons Ratio | 0.32 |
| Shear Modulus | 82.6 GPa |
| Hardness, Brinell | 125 |
| Hardness, Vickers | 253 |
| CAS DataBase Reference | 7440-48-4(CAS DataBase Reference) |
| IARC | 2B (Vol. 52) 1991, 2B (Vol. 86) 2006, 2A (Vol. 86) 2006 |
| NIST Chemistry Reference | Cobalt(7440-48-4) |
| EPA Substance Registry System | Cobalt (7440-48-4) |
Description and Uses
Cobalt was discovered by George Brandt in 1737. Cobalt exists in valence states from 0 to 5, with the most stable (+2 and +3) being the most common. Although there is only one stable isotope of cobalt, there are a number of unstable isotopes. Two of these, cobalt-60 and cobalt-57, are in use commercially. Cobalt-60 is used for cancer treatment and food irradiation. Cobalt-57 has research applications.
Cobalt has many practical uses.Historically, as well as today, different compounds of cobalt have been used for their colorsknown as cobalt blue, cerulean, new blue, smalt, cobalt yellow, and green.For many centuries cobalt was used to color glass, pottery, and porcelain and as an enamel.It is also used as a dye and paint pigment.As mentioned, cobalt alloyed with iron and nickel is used to make powerful permanentmagnets that are used in many industries.A major use is as an alloy with chromium to produce high-speed machine-cutting toolsthat are resistant to high temperatures.A cobalt alloy of copper and tungsten, called “stellite,” also maintains its hardness at hightemperatures, making it an ideal alloy for high-speed drills and cutting tools.The radioisotope cobalt-60, with a half-life of 5.27 years (1925.3 days) through beta (β)emission, decays to form the stable element nickel-60. It is used to test welds and metal castsfor flaws, to irradiate food crops to prolong freshness, as a portable source of ionizing gamma(γ) radiation, for radiation research, and for a medical source of radiation to treat cancers andother diseases.Cobalt is an important trace element for proper human nutrition. It is also a natural component of vitamin B12.
Safety
| Symbol(GHS) |   GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H302-H317-H319-H334-H341-H350-H360F-H412 |
| Precautionary statements | P273-P280-P301+P312-P302+P352-P305+P351+P338-P308+P313 |
| Hazard Codes | T,Xn,F |
| Risk Statements | 45-23/24/25-34-53-42/43-40-36/37-36/38-17-11-15 |
| Safety Statements | 53-23-26-36/37/39-45-61-37-24-22-36/37-5-43 |
| RIDADR | UN 3264 8/PG 3 |
| OEB | D |
| OEL | TWA: 0.05 mg/m3 |
| WGK Germany | 3 |
| RTECS | GF8750000 |
| TSCA | TSCA listed |
| HS Code | 8105 20 00 |
| HazardClass | 4.1 |
| PackingGroup | III |
| Storage Class | 4.1B - Flammable solid hazardous materials |
| Hazard Classifications | Aquatic Chronic 4 Carc. 1B Eye Irrit. 2 Flam. Sol. 1 Muta. 2 Repr. 1B Resp. Sens. 1 Skin Sens. 1 |
| Hazardous Substances Data | 7440-48-4(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 6170 mg/kg |
| IDLA | 20 mg Co/m3 |
| Limited Quantities | 1.0 Kg (2.2 lbs) |
| Excepted Quantities | Max Inner Pack (30g or 30ml) and Max Outer Pack (500g or 500ml) |