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Germanium oxide

Uses Preparation Reactions
Germanium oxide
Germanium oxide structure
Chemical Name:
Germanium oxide
GeO2;Germania;germanicacid;Germanic acid;germanic oxide;Germaniumdioxid;GERMANIUM OXIDE;Germanium Dixoide;GERMANIUM DIOXIDE;GERMANIUM(+4)OXIDE
Molecular Formula:
Formula Weight:
MOL File:

Germanium oxide Properties

Melting point:
>400 °C(lit.)
6.239 g/mL at 25 °C
refractive index 
storage temp. 
no restrictions.
ethylene glycol: soluble
Powder/Flake/Crystalline/Beads/Lump, Etc.
Specific Gravity
Water Solubility 
0.4 g/100 mL
Solubility Product Constant (Ksp)
pKsp: 57
CAS DataBase Reference
1310-53-8(CAS DataBase Reference)
EWG's Food Scores
NIST Chemistry Reference
Germanium dioxide(1310-53-8)
EPA Substance Registry System
Germanium oxide (GeO2) (1310-53-8)
  • Risk and Safety Statements
Signal word  Warning
Hazard statements  H302-H332
Precautionary statements  P264-P270-P301+P312a-P330-P501a
Hazard Codes  Xn
Risk Statements  22
Safety Statements  22-24/25
WGK Germany  1
RTECS  LY5240000
HS Code  2825 60 00
Toxicity LD50 i.p. in rats: 750 mg/kg, Rosenfeld, Wallace, Arch. Ind. Hyg. Occup. Med. 8, 466 (1953)

Germanium oxide price More Price(26)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 1.12177 Germanium(IV) oxide 99+ 1310-53-8 2 g $59.38 2021-03-22 Buy
Sigma-Aldrich 1.12177 Germanium(IV) oxide 99+ 1310-53-8 5 g $106.37 2021-03-22 Buy
Sigma-Aldrich 199478 Germanium(IV) oxide (crystalline powder), 99.998% trace metals basis 1310-53-8 10g $116 2021-03-22 Buy
Sigma-Aldrich 199478 Germanium(IV) oxide (crystalline powder), 99.998% trace metals basis 1310-53-8 25g $243 2021-03-22 Buy
Sigma-Aldrich 1.12177 Germanium(IV) oxide 99+ 1310-53-8 25 g $423.65 2021-03-22 Buy

Germanium oxide Chemical Properties,Uses,Production


Germanium oxide has high refractive index and infrared transmission, for which it is used in industrial glasses. It also is used in preparation of high purity grade germanium.


Germanium dioxide is prepared by heating germanium with oxygen at elevated temperatures, or by hydrolysis of germanium(IV) halides:
GeCl4 + 2H2O → GeO2 + 4HCl
It also is prepared by oxidation of germanium(II) sulfide:
GeS + 2O2 GeO2 + SO2
The product obtained in the above reactions is in the form of hexagonal modification of GeO2.


Germanium dioxide is reduced to germanium metal when heated with hydrogen at 1,000°C:
GeO2 + 2H2 → Ge + 2H2O
When heated with germanium, the dioxide is reduced to monoxide, GeO:
GeO2 + Ge 2GeO
Treatment with hydrochloric acid yields germanium(IV) chloride:
GeO2 + 4HCl → GeCl4 + 2H2O
In a strongly acidic solution, its reaction with hydrogen sulfide yields an amorphous modification of germanium(IV) sulfide, GeS2.
Melting a mixture of germanium dioxide and metal oxides produces orthoand metagermanates of the corresponding metals. Aqueous solutions of germanate react with molybdic and tungstic acids forming heteropoly acids of varying compositions.


Germanium dioxide is the oxide of germanium, an inorganic compound, featuring the chemical formula GeO2. It is formed as a passivation layer on pure germanium after exposure to oxygen. Germanium dioxide generally has a low toxicity, but shows severe nephrotoxicity at higher doses. Germanium dioxide is still offered on the market in some questionable miracle therapies. Exposure to high doses of germanium dioxide can lead to germanium poisoning.

Chemical Properties

White powder, hexagonal, tetragonal, and amorphous.

Physical properties

Germanium dioxide ccurs in two crystalline and one amorphous modifications: (1) a tetragonal rutile form, refractive index 2.05, density 6.24 g/cm3 at 20°C. (2) white hexagonal quartz modification, refractive index 1.735, density 4.70 g/cm3 at 18°C, and (3) a glassy amorphous form, refractive index 1.607, density 3.64 g/cm3 at 20°C. The tetragonal form is practically insoluble in water, while the hexagonal and the amorphous modifications have low solubilities; 0.45 and 0.52% respectively, at 25°C. Aqueous solutions are acidic due to formation of metagermanic acid, H2GeO3. Hexagonal modification converts to a tetragonal crystal system when heated at 350°C in water under pressure. Both crystalline forms convert to a glass-like amorphous GeO2 when heated at 1,100°C.


Germanium oxide can be used in Phosphors, transistors and diodes, infraredtransmitting glass.


When Germanium dioxide is 99.999% pure, it is used as a semiconductor in transistors, in diodes, and to make special infrared transmitting glass.

Safety Profile

Poison by intraperitoneal route. When heated to decomposition it emits acrid smoke and irritating fumes.

Purification Methods

The oxide (GeO2) is usually prepared by hydrolysing redistilled GeCl4 and igniting it in order to remove H2O and chloride. It can be further purified by dissolving in hot H2O (solubility is 4g/L cold) evaporating and drying the residual crystalline solid. When the soluble form (which is produced in H2O at 355o) is heated for 100hours, it is converted to the insoluble form. This form is stable at temperatures up to 1033o, and fusion at 1080o for 4hours causes complete de-vitrification and it reverts to the soluble form. [Müller & Blank J Am Chem Soc 46 2358 1924, Dennis & Laubengayer J Am Chem Soc 47 1945 1925, Laubengayer & Morton J Am Chem Soc 54 2303 1932, Schenk in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 706 1963.]

Germanium oxide Preparation Products And Raw materials

Raw materials

Preparation Products

Germanium oxide Suppliers

Global( 238)Suppliers
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Henan DaKen Chemical CO.,LTD.
+86-371-66670886 China 20903 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 22607 55
Nanjing ChemLin Chemical Industry Co., Ltd.
025-83697070 CHINA 3013 60
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Shanghai Longyu Biotechnology Co., Ltd.
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View Lastest Price from Germanium oxide manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-12-06 Sodium Saccharin GeO2
US $0.00 / Kg/Drum 1KG 99.9% 100000kg per month Wuhan Mulei New Material Technology Co. Ltd
2021-06-08 Germanium oxide
US $10.00 / KG 1KG 99% 500tons/month Shanxi Naipu Import and Export Co.,Ltd
2020-09-19 Germanium Dioxide
US $15.00 / KG 1KG 99% 500 Ton/Tons per Month Hebei Runbin Biotechnology Co. LTD

Germanium oxide Spectrum

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