Potassium acetate
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| Potassium acetate | |
|---|---|
| Potassium acetate | |
| General | |
| Other names | potassium salt |
| Molecular formula | CH3COOK |
| Molar mass | 98.15 g/mol |
| Appearance | white crystalline powder deliquescent |
| CAS number | [127-08-2] |
| Properties | |
| Density and phase | 1.57 g/cm3, solid |
| Solubility in water | 200g/100g water |
| Melting point | 292°C |
| Boiling point | n/a |
| pH | 9.7 (0.1M solution) |
| Hazards | |
| EU classification | not listed |
| NFPA 704 |
 0
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| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references | |
Potassium acetate (CH3COOK) is a chemical compound.
It can be prepared by reacting a potassium-containing base such as potassium hydroxide or potassium carbonate with acetic acid: 2CH3COOH + K2CO3 → 2CH3COOK + CO2 + H2O This sort of reaction is known as an acid-base neutralization reaction. Potassium acetate is the salt that forms along with water as acetic acid and potassium hydroxide are neutralized together.
Conditions/substances to avoid are: moisture, heat, flames, ignition sources, and strong oxidizing agents.
Applications
Potassium acetate can be used as deicer instead of chloride salts like calcium chloride or magnesium chloride. It offers the advantage of being less aggressive on soils and much less corrosive, and for this reason is preferred for airport runways. It is, however, more expensive.
Potassium acetate is the extinguishing agent used in class K fire extinguishers because of its ability to cool and form a crust over the burning oils.
Potassium acetate is used as part of replacement protocols in the treatment of diabetic ketoacidosis because of its ability to breakdown into bicarbonate and help neutralize the acidotic state.
Potassium acetate is used as a food additive (preservative, acidity regulator) found on food labels in the European Union.
Potassium acetate is used in mixtures applied for tissue preservation, fixation, and mummification. Most museums today use the formaldehyde-based method recommended by Kaiserling in 1897 and containing potassium acetate.[1] For example, Lenin's mummy was soaked in a bath containing potassium acetate.[2]
References
- ↑ Dale Ulmer, "Fixation. The Key to Good Tissue Preservation.", Journal of the International Society for Plastination, Vol 8 (1): 7-10, 1994
- ↑ Andrew Nagorski, "The Greatest Battle", Simon and Shuster, 2007, page 53.
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