
Potassium sulfite (MF: K₂SO₃; MW: K₂SO₃) is a white, odorless crystalline powder that is highly soluble in water; its aqueous solution is weakly alkaline. It possesses strong reducing properties and serves as an important preservative and antioxidant in the food industry, as well as in fields such as textile dyeing, photography, and water treatment.
| Item | Specification |
| Melting Point | N/A |
| Boiling Point | N/A |
| Density | 2.353 g/cm³(20℃) |
| Flash point | N/A |
| Vapor Pressure | N/A |
| Refractive index | N/A |
| Solubility | Easily soluble in water; sparingly soluble in ethanol |
| PH | 8(1% aqueous solution) |
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