|Molar mass||136.169 g/mol|
197 °C, 470 K, 387 °F
Dec. > 300 °C
|Solubility in water||490 g/L|
|EU classification||Corrosive (C)|
|R-phrases||R34, R36, R37, R38|
|S-phrases||(S1/2), S26, S36/37/39, S45|
|Related compounds||Sodium bisulfate|
| (what is: / ?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
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
4 and H
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.
- 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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