Cobalt , 99.5% , 7440-48-4

Synonym(s):
;Cobalt;Cobalt (nanoparticles);Cobalt element;Cobalt-59

CAS NO.：7440-48-4

Empirical Formula: Co

Molecular Weight: 58.93

MDL number: MFCD00010935

EINECS: 231-158-0

PRODUCT Properties

• Melting point: 1495°C
• Boiling point: 2900 °C (lit.)
• Density: 8.9 g/mL at 25 °C (lit.)
• vapor pressure: 0Pa at 20℃
• storage temp.: no restrictions.
• solubility: H₂O: soluble
• form: wire
• color: Pink to red to violet
• Specific Gravity: 8.9
• 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.

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 is used in steel alloys, cementedcarbide abrasives and jet engines.

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: Yes
• HS Code: 8105 20 00
• HazardClass: 4.1
• PackingGroup: III
• Toxicity: LD50 orally in Rabbit: 6170 mg/kg
• IDLA: 20 mg Co/m3