Telluric acid
| Names | |
|---|---|
| IUPAC name
Hexahydroxidotellurium | |
Other names
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| Identifiers | |
3D model (JSmol) |
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| ChEBI | |
| ChemSpider | |
| ECHA InfoCard | 100.029.334 |
PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| Te(OH)6 | |
| Molar mass | 229.64 g·mol−1 |
| Appearance | White monoclinic crystals |
| Density | 3.07 g/cm3 |
| Melting point | 136 °C (277 °F; 409 K) |
| 50.1 g/(100 ml) at 30 °C | |
| Acidity (pKa) | 7.5, 11, 14 |
| Conjugate base | Tellurate |
| Structure | |
| octahedral | |
| 0 D | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
corrosive |
| Related compounds | |
Other anions |
Hydrotelluric acid Tellurous acid Hydrogen telluride |
Related compounds |
Teflic acid Sulfuric acid Selenic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
Telluric acid, or more accurately orthotelluric acid, is a chemical compound with the formula Te(OH)6, often written as H6TeO6. It is a white crystalline solid made up of octahedral Te(OH)6 molecules which persist in aqueous solution. In the solid state, there are two forms, rhombohedral and monoclinic, and both contain octahedral Te(OH)6 molecules, containing one hexavalent tellurium (Te) atom in the +6 oxidation state, attached to six hydroxyl (–OH) groups, thus, it can be called tellurium(VI) hydroxide. Telluric acid is a weak acid which is dibasic, forming tellurate salts with strong bases and hydrogen tellurate salts with weaker bases or upon hydrolysis of tellurates in water. It is used as tellurium-source in the synthesis of oxidation catalysts.