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℃ |
| CAS DataBase Reference | 7440-56-4(CAS DataBase Reference) |
| NIST Chemistry Reference | Germanium(7440-56-4) |
| EPA Substance Registry System | Germanium (7440-56-4) |
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 |
| Hazardous Substances Data | 7440-56-4(Hazardous Substances Data) |
