Germanium , Φ4mm height (thick) 1mm cylindrical GE ≥99.999 % , 7440-56-4

CAS NO.：7440-56-4

Empirical Formula: Ge

Molecular Weight: 72.64

MDL number: MFCD00085310

EINECS: 231-164-3

PRODUCT Properties

• Melting point: 937 °C (lit.)
• Boiling point: 2830 °C (lit.)
• Density: 5.35 g/mL at 25 °C (lit.)
• vapor pressure: 0Pa at 25℃
• storage temp.: Flammables area
• solubility: insoluble in H2O, dilute acid solutions, alkaline solutions
• form: powder
• color: Silver
• Specific Gravity: 5.35
• Resistivity: 53000 μΩ-cm, 20°C
• Water Solubility: insoluble H2O, HCl, dilute alkali hydroxides; attacked by aqua regia [MER06]
• Crystal Structure: Cubic, Diamond Structure - Space Group Fd3m
• Merck: 13,4419
• Exposure limits: ACGIH: TWA 0.5 ppm(2.5 mg/m3); Ceiling 2 ppm (Skin); OSHA: TWA 3 ppm; NIOSH: IDLH 30 ppm(250 mg/m3); TWA 3 ppm(2.5 mg/m3); Ceiling 6 ppm(5 mg/m3)
• Stability: Stable. Slightly soluble in strong acids. Incompatible with strong oxidizing agents.
• LogP: 4.14 at 20℃

Description and Uses

Germanium is extracted from zinc ores in a very complicated process as it has aqueous properties similar to those of zinc. Once the germanium/zinc mixture has been sufficiently enriched with germanium, it is heated in HCl with Cl₂ in order to allow the formation of germanium tetrachloride (GeCl₂).

The product can serve as one of the precursors for the formation of highly porous ZrO₂:Tb³⁺ nanophosphor with excellent tunable photoluminescence and photocatalytic activities.

Safety

• Symbol(GHS): GHS02,GHS08,GHS09
• Signal word: Danger
• Hazard statements: H228-H361-H373-H410
• Precautionary statements: P201-P202-P210-P240-P273-P308+P313
• Hazard Codes: F,Xi
• Risk Statements: 36/37/38-36/38-11
• Safety Statements: 26-36/39-2
• RIDADR: UN 3089 4.1/PG 2
• WGK Germany: 3
• RTECS: LY5200000
• TSCA: Yes
• HazardClass: 8
• PackingGroup: III
• HS Code: 28053090