Tellurium

Tellurium Oxide

CAS #: 7446-07-3
Molecular Formula: TeO2
EC No.: 231-193-1

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Product Details

Tellurium oxide is an inorganic compound with the molecular formula TeO2. It is the oxide of tellurium and a white crystalline substance. It has a tetragonal crystal structure. It turns yellow when heated and dark yellowish red when melted. It is slightly soluble in water and soluble in strong acids and strong bases, forming double salts. It decomposes under high heat, releasing toxic vapors. The harmful combustion product is tellurium oxide.

Applications:

It is used for the preparation of tellurium dioxide single crystals.

2. It is used for making electronic components.

3. It is used for making preservatives.

Product Series

Product	Product Code	Security Data	Technical Data
Tellurium Oxide 99.99%	ET-Te-01	Tellurium dioxide.pdf	Tellurium Dioxide TeO2 99.99%.pdf
Tellurium Oxide 99.999%	ET-Te-02	Tellurium dioxide.pdf	Tellurium Oxide TeO2 99.999%.pdf

Properties (Theoretical)

Molecular Formula	O₂Te
Molecular Weight	159.6
Appearance	White Powder
Melting Point	733 °C (1351 °F)
Boiling Point	1245 °C (2273 °F)
Density	6.239 g/cm3
Precise Quality	91.9317 g/mol
Single Isotope Mass	105.911007 Da

Health & Safety Information

Signal Word	N/A
Risk Statement	N/A
Dangerous Code	N/A
Preventive Instructions	N/A
Flash Point	Not applicable
Risk Code	N/A
Safety Statement	N/A
RTECS Number	WY2675000
Transportation Information	NONH
WGK Germany	2

Packaging Specifications:

Standard packaging: 50 kg/drum, 500 kg/pallet, ton bags

Sample packaging: 500 g/bag, 1 kg/bottle

Tellurium Oxide

The natural mineral of tellurium dioxide is "yellow tellurite". Chemical formula: TeO2. Molecular weight: 159.60. Colorless crystal, melting point 732.6℃. There is a dicrystal form: the one obtained from nitric acid solution belongs to the tetragonal crystal system and resembles an octahedral shape. Relative density 5.67(at 15℃). It turns yellow when heated, melts into a dark yellow liquid, and cools to form needle-like crystals (orgonium crystal system), with a relative density of 5.91 at 0℃. Insoluble in water. It is readily soluble in concentrated strong acids to form adducts and salts. It is also readily soluble in concentrated caustic alkali solutions to form tellurite. Insoluble in ammonia water. Tellurium is obtained by burning in oxygen or by reacting tellurium with cold concentrated nitric acid and evaporating the reaction solution. Preparation: Elemental tellurium powder is reacted with nitric acid. The reaction is heated until the tellurium powder is completely reacted and the release of nitrogen oxides stops. After evaporation, cooling and crystallization, basic tellurium nitrate Te2O3(OH)NO3 is obtained. This product is decomposed by heating at 400-430 ℃ to obtain the final product.

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