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Potassium acetate is the potassium salt of acetic acid.
Potassium acetate is manufactured through the reaction between a potassium base such as potassium hydroxide or potassium carbonate with acetic acid.
Potassium acetate is an important macromineral with many physiological functions and is required for nerve conduction, cardiac, skeletal and smooth muscle contraction, energy generation, nucleic acid synthesis as well as mainlining the blood pressure and normal renal function.
CAS: 127-08-2
MF: C2H3KO2
MW: 98.14
EINECS: 204-822-2
Synonyms
Potassium acetate 99.98% trace metals basis, ~100 ppm Rb, <50 ppm Cs;Potassium acetate ACS reagent, >=99.0%;Potassium acetate anhydrous, free-flowing, Redi-Dri(TM), ACS reagent, >=99.0%;Potassium acetate puriss. p.a., >=99% (perchloric acid titration);Potassium acetate puriss., meets analytical specification of Ph. Eur., BP, E261, 99-101%;Potassium acetate ReagentPlus(R), >=99.0%;Potassium acetate Vetec(TM) reagent grade, 99%;EPA608-PERFORMANCE CHECK SOLUTION
Potassium acetate can be taken as a nutritional supplement with antihypertensive effects and prevention effects against hypokalemia.
Potassium acetate has several other common applications: (1) as a deicer; (2) as a food additive; (3) molecular biology applications such as DNA purification, tissue preservation, fixation and mummification; (4) Death penalty (5) as the catalyst during the production of polyurethanes.
Potassium acetate is the potassium salt of acetic acid.
A potassium salt comprising equal numbers of potassium and acetate ions
Potassium acetate is generally used as an acidity regulator, buffer, preservative and firming agent.
Potassium acetate (also called potassium ethanoate), (CH3COOK) is the potassium salt of acetic acid.
Potassium acetate is a hygroscopic solid at room temperature.
Potassium Acetate Chemical Properties
Melting point: 292 °C
density: 1.57 g/cm3 at 25 °C (lit.)
vapor pressure: <0.0000001 hPa ( 25 °C)
FEMA: 2920 | POTASSIUM ACETATE
refractive index: n20/D 1.370
Fp: >250℃
storage temp.: room temp
solubility: 65% soluble in water, 35% soluble in alcohol, insoluble in most oils
pka: 4.756[at 20 ℃]
form: Solid
color: White to light brown
Specific Gravity: 1.57
Odor: Odorless
PH Range: 7 - 9 at 98.2 g/l at 25 °C
PH: 7.87(1 mM solution);8.33(10 mM solution);8.75(100 mM solution);9.06(1000 mM solution)
biological source: synthetic
Water Solubility: 2694 g/L (25 ºC)
λmax λ: 260 nm Amax: 0.04
λ: 280 nm Amax: 0.02
Sensitive: Hygroscopic
Hydrolytic Sensitivity 0: forms stable aqueous solutions
Merck: 14,7605
BRN: 3595449
Stability: Deliquescent. Stable. Incompatible with strong oxidizing agents.
Cosmetics Ingredients Functions: FILM FORMING
InChI: 1S/C2H4O2.K/c1-2(3)4;/h1H3,(H,3,4);/q;+1/p-1
InChIKey: SCVFZCLFOSHCOH-UHFFFAOYSA-M
LogP: -3.72
CAS DataBase Reference: 127-08-2(CAS DataBase Reference)
NIST Chemistry Reference: Potassium acetate(127-08-2)
EPA Substance Registry System: Potassium acetate (127-08-2)
Potassium acetate is odorless or has a faint acetic odor and a saline taste.
Potassium acetate, KC2H302, is a white, deliquescent solid, soluble in water and alcohol, insoluble in ether, that melts at 292°C.
Potassium acetate is used as an analytical reagent, dehydrating agent, in medicine, and in crystal glass manufacture.
Uses
Potassium acetate is used in the manufacture of glass; as a softening agent for papers and textiles; as a dehydrating agent; and as a buffer.
In medicine Potassium acetate is used as an expectorant and diuretic.
Potassium acetate was originally used in the preparation of Cadet's fuming liquid, the first organometallic compound produced.
Potassium acetate is used as diuretic and urinary alkaliser, and acts by changing the physical properties of the body fluids and by functioning as an alkali after absortion.
Potassium acetate, crystalline powder, USP is, as its name suggests, the potassium salt of acetic acid and is used as a catalyst for producing polyurethanes2) .
In the food industry Potassium acetate is used as a food additive, an acidity regulator and a preservative.
Potassium acetate is used as a catalyst in the production of polyurethanes.
Potassium acetate can be used as a deicer instead of chloride salts such as calcium chloride or magnesium chloride.
Potassium acetate offers the advantage of being less aggressive on soils and much less corrosive, and for this reason is preferred for airport runways.
Potassium acetate is, however, more expensive.
Potassium acetate is also the extinguishing agent used in class K fire extinguishers because of its ability to cool and form a crust over burning oils.
Food additive
Potassium acetate is used as a food additive as a preservative and acidity regulator.
In the European Union, Potassium acetate is labeled by the E number E261 ; it is also approved for usage in the USA and Australia and New Zealand.
Potassium acetate with formula KH(O2CCH3)2 is a related food additive with the same E number as potassium acetate.
Medicine and biochemistry
In medicine, potassium acetate is used as part of replacement protocols in the treatment of diabetic ketoacidosis because of its ability to break down into bicarbonate and help neutralize the acidotic state.
In molecular biology, potassium acetate is used to precipitate dodecyl sulfate (DS) and DS-bound proteins, allowing the removal of proteins from DNA.
Potassium acetate is also used as a salt for the ethanol precipitation of DNA.
Deicing
Potassium acetate (as a substitute for calcium chloride or magnesium chloride) can be used as a deicer to remove ice or prevent its formation.
Potassium acetate offers the advantages over chlorides of being less aggressive on soils and much less corrosive: for this reason, Potassium acetate is one of the preferred substances for removal of ice from airplanes and airport runways.
Fire extinguishing
Potassium acetate is the extinguishing agent used as a component in some Class K fire extinguishers because of its ability to cool and form a crust over burning oils.
Food additive
Potassium acetate is used in processed foods as a preservative and acidity regulator.
In the European Union, Potassium acetate is labeled by the E number E261; it is also approved for usage in the USA, Australia, and New Zealand.
Medicine and biochemistry
In molecular biology, potassium acetate is used to precipitate Sodium dodecyl sulfate (SDS) and SDS-bound proteins to allow their removal from DNA.
Potassium acetate is used in mixtures applied for tissue preservation, fixation, and mummification.
Most museums today use a formaldehyde-based method recommended by Kaiserling in 1897 which contains potassium acetate.
This process was used to soak Lenin's corpse.
Industry
Potassium acetate is used as a catalyst in the production of polyurethanes.
Use in executions
Potassium acetate was incorrectly used in place of potassium chloride when putting a prisoner to death in Oklahoma in January 2015.
Charles Frederick Warner was executed on January 15, 2015 with potassium acetate; this was not public knowledge until the scheduled execution of Richard Glossip was called off.
In August 2017, the U.S. state of Florida used potassium acetate (intentionally) in the execution of Mark James Asay.
Preparation
Potassium Acetate can be prepared by treating a potassium-containing base such as potassium hydroxide or potassium carbonate with acetic acid:
2 CH3COOH + K2CO3→ 2 CH3CO2K + 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.
Potassium acetate is prepared by addition of potassium carbonate in a small volume of water to acetic acid solution, followed by evaporation and crystallization:
K2CO3+ 2CH3COOH →2CH3COOK + H2O
