Potassium Sulfite is a non-flammable white soluble compound. It is commonly used as a food preservative (E225). Let us learn about the chemical formula and various other details of Potassium Sulfite.
Properties Of Potassium Sulfite
| Chemical formula | K2O3S |
| Molecular weight | 158.254 g/mol |
| Chemical names | Dipotassium sulfite
Potassium sulphite Sulfurous acid, dipotassium salt |
| Solubility in water | Soluble |
| Acidity (pKa) | 8 |
Potassium Sulfite Structural Formula
The structural formula of Potassium Sulfite is as shown in the figure below.
The potassium sulfite is formed by the decomposition of potassium metabisulfite at 190°C.
K2S2O5 → K2SO3 + SO2
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