Sodium tellurite
Sodium tellurite is a chemical compound. Its chemical formula is Na2TeO3. It contains sodium and tellurite ions.
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| Other names
Sodium Tellurite IV, Tellurous acid disodium salt
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| Identifiers | |
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3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.030.231 |
PubChem CID
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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 | |
| 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 | |
Properties
changeSodium 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
changeIt is made by reacting tellurium dioxide with sodium hydroxide, or by heating a telluride in air with sodium carbonate.
Uses
changeSodium 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.