potassium acetate
Pharmaceutical Materials 2025-03-03
Chemical Name: Potassium Acetate
Molecular Formula: CH3COOK
Molecular Weight: 98.14 g/mol
Appearance: White crystalline powder
Solubility: Soluble in water, slightly soluble in ethanol
Usage: Used as a food preservative, buffer in pharmaceuticals, and as a deicing agent.
Potassium acetate, with the chemical formula CH3COOK, is a white crystalline powder commonly used in various industries. It is primarily known for its applications as a food additive for preserving and controlling acidity, a component in fire extinguishers for its eco-friendly properties, and as a deicing agent with reduced environmental corrosion compared to chlorides. Potassium acetate also plays a role in medical fields, serving as a diuretic and aiding in the preservation of biological tissue samples. Its preparation typically involves reaction between potassium hydroxide or potassium carbonate and acetic acid.
| Property | Value |
|---|---|
| Chemical Formula | CH3COOK |
| CAS Number | 127-08-2 |
| Physical Properties | – |
| Appearance | White crystalline powder |
| Density | 1.57 g/cm³ at 25°C |
| Melting Point | 292°C |
| Odor | Slightly alkaline |
| Chemical Properties | – |
| Solubility | Soluble in water, methanol, ethanol, and ammonia; insoluble in ether and acetone |
| pH of Aqueous Solution | Weakly alkaline (pH ~9.7 for 0.1M solution) |
| Refractive Index | 1.370 at 20°C |
| Flammability | Combustible |
| Stability | Stable under normal conditions, but hygroscopic |
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