Germanium

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　　Germanium is a colorless, toxic flammable gas with a pungent odor. It can burn spontaneously in the air. It is compatible with hydrogen, argon, helium, nitrogen, and is often mixed with these gases. Germanium is used in the deposition of epitaxial silicon and amorphous silicon, germanium and alloy, and as a component of plasma enhanced chemical vapor deposition of (Si, Ge) 02 thin films, providing a controllable refractive index for optoelectronic applications. Usually carried by free gas, rather than under self pressure.

Container information
Cylinder size	Capacity	Pressure at 21.1 C temperature ： A130, B118 or C104 pounds per square foot Valve outlet： CGA-350/DISS-632 Shipping description ： Germanium alkane, 2.3, UN2192, inhalation poisoning hazard, hazard zone B Shipping label ： Toxic gases; flammable gases Boot number ： 18 CAS Registry Numbers ： 1590-87-0
	gram
A030a A016b A07c	1000 500 200

Specifications
GermaniumComponent	Electronic grade Purity of at least 99.999% (excluding ethyl, germanium and hydrogen)
Carbon dioxide	< 2 ppm
Carbon monoxide	< 1 ppm
Hydrogen	< 50 ppm
Nitrogen	< 2 ppm
Oxygen + argon	< 0.5 ppm
Total hydrocarbons (e.g. methane)	< 1 ppm
Trigermane	< 1 ppm
Storage period: 1 years

Physical property
Molecular weight	76.64
Flammability limit in air	pyrophoric
The specific gravity of the gas at 1 standard atmospheric pressure (air =1) and 70cF (21.1 C) temperature	2.65
The density of gases at 1 Standard atmospheres and 70cF (21.1 C) temperatures	0.198lbs/ft3 (3.17g/l)
Specific volume of gas at 1 standard atmospheric pressure and 70cF (21.1 C) temperature	5.05ft3/lb (0.315l/g)
At 75.1 psi / square foot (518 kPa) the melting point of the atmosphere	-266.6℉ (-165.9°C)
The boiling point at 1 Standard atmospheres	-127℉ (-88.4°C)
Critical temperature	94.7℉ (34.8°C)
Critical pressure	805.3 pounds per square foot (55.5 bar)
Toxicity
Time weighted average threshold value >	0.2 ppm
Median lethal concentration	50 ppm