Sodium tellurite
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| Names | |
|---|---|
| Other names
Sodium Tellurite IV, Tellurous acid disodium salt | |
| Identifiers | |
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.030.231 |
PubChem CID |
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| RTECS number |
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CompTox Dashboard (EPA) |
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| Properties | |
| Na2TeO3 | |
| Molar mass | 221.57774 g/mol |
| Appearance | white crystals, powder |
| Density | 6.245 g/cm3 |
| Melting point | 710 °C |
| Boiling point | unknown (very high) |
| soluble greater than or equal to 100 mg/mL at 68°F | |
| Structure | |
| rhombic | |
| Hazards | |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) |
20 mg/kg |
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.