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Boiling Point: 185-6°
EINECS Number: 238-007-8
Melting Point: -72°
Molecular Weight: 252.84
Alternative Name: GERMANIUM ETHOXIDE
Specific Gravity: 1.134
Flashpoint: 62°C (144°F)
HMIS Key: 2-2-1-X
Hydrolytic Sensitivity: 7: reacts slowly with moisture/water
Refractive Index: 1.4049
Application: Sol-gel intermediate for optical fiber preforms,1 and monoliths.2,3
Forms GeO2 by PCVD.4
Incorporation into SiO2 interlayer dielectric / passivation reduces reflow temp.5
Sol-gel derived SiO2-GeO2 glasses are photosensitive / high-pressure H2 loading.6,7
Reacts with H2S, sulfur, water to form semiconductor germanium disulfide.8
Reference: 1. Matsuo, N. et al. Chem. Abstr. 105, 10766e; German Patent 3,535,367, 1986.
2. Mukherjee, S. Mater. Res. Soc. Symp. Proc. 1984, 32, 111.
3. Mukherjee, S. Mater. Res. Soc. Symp. Proc. 1986, 73, 443.
4. Secrist, D. et al. Bull. Am. Ceram. Soc. 1966, 45, 784.
5. Fisher, S. et al. Solid State Tech., p55, September, 1993.
6. Czekaj, C. et al. Amer. Chem. Soc. Meeting, August 1994.
7. Green, B. et al. J. Non-Cryst. Solids 1994, 168, 195.
8. Etsell, T. et al. J. Mater. Chem. 1997, 7, 105.
Additional Properties: Dipole moment: 1.7 debyeSurface tension, 25°: 23.2 dynes/cm?Hcomb: -1,323.3 kcal/mole?Hvap: 10.3 kcal/mole>99.99% (metals basis)Vapor pressure, 86°: 12 mm