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Sodium tellurite

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Sodium tellurite
Other names
Sodium Tellurite IV, Tellurous acid disodium salt
  • 10102-20-2
3D model (JSmol)
ECHA InfoCard 100.030.231
RTECS number
  • WY2450000
  • [Na+].[Na+].[O-][Te]([O-])=O
Molar mass 221.57774 g/mol
Appearance white crystals, powder
Density 6.245 g/cm3
Melting point 710 °C
Boiling point unknown (very high)
greater than or equal to 100 mg/mL at 68°F
R-phrases R23 R24 R25
S-phrases S22 S36 S37 S39 S45
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Sodium tellurite is a chemical compound. Its chemical formula is Na2TeO3. It contains sodium and tellurite ions.

Properties[change | change source]

Sodium tellurite is a colorless solid. The tellurite ion can react with water to make sodium hydrogen tellurite, NaHTeO3. It dissolves in water easily. It is a weak oxidizing agent (can be reduced to tellurium) and a weak reducing agent (can be oxidized to tellurates). It is part of the process in making tellurium.

Preparation[change | change source]

It is made by reacting tellurium dioxide with sodium hydroxide, or by heating a telluride in air with sodium carbonate.

Uses[change | change source]

Sodium tellurite is used in making tellurium. It is also used to make electroplated nickel corrosion-resistant. It can also be used to add a bluish coating to steel. It can be used to isolate certain types of bacteria that it is not toxic to.

Related pages[change | change source]