Potassium bisulfate
From Wikipedia, the free encyclopedia
| Potassium bisulfate | ||
|---|---|---|
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| IUPAC name Potassium hydrogen sulfate | ||
| Other names Potassium acid sulfate | ||
| Identifiers | ||
| CAS number | 7646-93-7  | |
| PubChem | 516920 | |
| EC number | 231-594-1 | |
| UN number | 2509 | |
| RTECS number | TS7200000 | |
| Properties | ||
| Molecular formula | KHSO4 | |
| Molar mass | 136.169 g/mol | |
| Density | 2.245 g/cm3 | |
| Melting point | 197 °C; 387 °F; 470 K | |
| Boiling point | Dec. > 300 °C | |
| Solubility in water | 490 g/L | |
| Hazards | ||
| MSDS | External MSDS | |
| EU Index | 016-056-00-4 | |
| EU classification | Corrosive (C) | |
| R-phrases | R34, R36, R37, R38 | |
| S-phrases | (S1/2), S26, S36/37/39, S45 | |
| LD50 | 2340 mg/kg-1 | |
| Related compounds | ||
| Related compounds | Sodium bisulfate | |
(verify) (what is: / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | ||
| Infobox references | ||
Potassium bisulfate is the potassium salt of bisulfate anion, with the molecular formula KHSO
4. This compound is commonly used in the conversion of tartrates to bitartrates in wine. Potassium bisulfate is also used as a disintegrating agent in analytical chemistry.
A solution of potassium bisulfate behaves as if the two related compounds (K
2SO
4 and H
2SO
4) were side by side uncombined. Adding ethanol to a solution of potassium bisulfate precipitates out sulfate.
Mercallite, the mineralogical form of potassium bisulfate, occurs very rarely. Misenite is the other, more complex, potassium hydrogen sulfate.
See also
References
- O'Neil, Maryadele J., ed. (2006). Merck Index of Chemicals and Drugs (14th ed.). Whitehouse Station, NJ: Merck. ISBN 978-0-911910-00-1.
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